{"title":"BMW 3 \/ 4 Series (B58)","description":"\u003cp\u003eThe B58 is one of the most common turbo straight-sixes of the last decade, and the parts market for it is crowded. This page collects TITANVEIN downpipes, midpipes and rear sections for B58 cars in SS304 and titanium, with catted and catless downpipe options.\u003c\/p\u003e\n\u003cp\u003eMost owners start with the downpipe. The 4 in and 5 in versions are intended for later turbo upgrades; for a stock turbo, the 3 in range is the better match. Rear sections come standard or valved, and a valved version noticeably changes the daily tone without any ECU change.\u003c\/p\u003e\n\u003ch2\u003eWhat to check before ordering\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eA larger downpipe is not automatically better: 4 in and 5 in serve high-power targets, while a stock turbo is better matched to 3 in.\u003c\/li\u003e\n\u003cli\u003eCatalyst position and sensor layout vary by build year on the B58 — always confirm the chassis code.\u003c\/li\u003e\n\u003cli\u003eA catless downpipe will normally trigger a check-engine light and needs ECU work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eDoes a B58 downpipe need a tune?\u003c\/h3\u003e\n\u003cp\u003eCatless versions usually do; catted versions often do not. Confirm with your tuner.\u003c\/p\u003e\n\u003ch3\u003eDoes a valved rear section need extra wiring?\u003c\/h3\u003e\n\u003cp\u003eIt needs a vacuum or electronic control source. The product page states what is included.\u003c\/p\u003e\n\n\u003ch2\u003eStart here\u003c\/h2\u003e\n\u003cp\u003eB58 cars take a different layout from the B48, so start from the engine code. This range covers the full system from downpipe back.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bmw-440i-catback-ss304\"\u003eBMW 440i Catback — SS304\u003c\/a\u003e — SS304\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bmw-3-4-series-b58-axle-back-ss304\"\u003eBMW 3 \/ 4 Series (B58) Axle Back\u003c\/a\u003e — SS304\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bmw-3-4-series-b58-downpipe-ss304\"\u003eBMW 3 \/ 4 Series (B58) Downpipe\u003c\/a\u003e — SS304\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bmw-3-4-series-b58-exhaust-tips-ss304\"\u003eBMW 3 \/ 4 Series (B58) Exhaust Tips\u003c\/a\u003e — SS304\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bmw-3-4-series-b58-single-midpipe-ss304\"\u003eBMW 3 \/ 4 Series (B58) Single Midpipe\u003c\/a\u003e — SS304\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"stainless-valved-catback-exhaust-bmw-m240i-g42","title":"Stainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025)","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBMW G42\u003c\/p\u003e\n\u003ch2\u003eStainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025)\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eStainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025)\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/H0e474b856d7b45d998e3205588b4e7efE.png?v=1792505808\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"Stainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025) — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW G42, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless steel — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/H0e474b856d7b45d998e3205588b4e7efE.png?v=1792505808\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"Stainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025) — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW G42\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW G42\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/H0e474b856d7b45d998e3205588b4e7efE.png?v=1792505808\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"Stainless Steel Valved Catback Exhaust — BMW M240i G42 B58 (2022–2025) — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW G42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,549.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW G42. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46255646376071,"sku":"CB-SS-M240I","price":1549.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/H0e474b856d7b45d998e3205588b4e7efE.png?v=1792505808"},{"product_id":"bmw-3-4-series-b58-valved-catback-ss304","title":"BMW 3 \/ 4 Series (B58) Valved Catback — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Catback — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eBuilt for BMW 3 \/ 4 Series (B58) Valved specifically. Fitment is confirmed against your VIN — because on a vehicle part, the fit is the product.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Valved-304-Stainless-Steel-Mirror-Polished-Catback.png?v=1792540452\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Valved, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Valved-304-Stainless-Steel-Mirror-Polished-Catback.png?v=1792540452\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Valved\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Valved-304-Stainless-Steel-Mirror-Polished-Catback.png?v=1792540452\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,077.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Valved. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260065894535,"sku":"JSH-B58-VALVEDCA-13","price":1077.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Valved-304-Stainless-Steel-Mirror-Polished-Catback.png?v=1792540452"},{"product_id":"bmw-3-4-series-b58-downpipe-ss304","title":"BMW 3 \/ 4 Series (B58) Downpipe — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eDownpipe\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Downpipe — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eDesigned around BMW 3 \/ 4 Series (B58): factory hanger points and flange positions, so it bolts on instead of being fabricated on. Send the VIN and we confirm the part before dispatch.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-1-5mm-Thick.png?v=1792540491\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Downpipe — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58), not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-1-5mm-Thick.png?v=1792540491\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Downpipe — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58)\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58)\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-1-5mm-Thick.png?v=1792540491\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Downpipe — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eDownpipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$370.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this downpipe fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58). Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260069957767,"sku":"JSH-B58-DOWNPIPE-14","price":370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-1-5mm-Thick.png?v=1792540491"},{"product_id":"bmw-3-4-series-b58-exhaust-tips-ss304","title":"BMW 3 \/ 4 Series (B58) Exhaust Tips — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBMW\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Exhaust Tips — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eUniversal fit: this goes into a system you are building, so we publish sizes and prices per variant rather than one vague 'fits most' claim.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Car-Exhaust-Pipe-Carbon-Fiber-Mirror-Polished.png?v=1792540533\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust Tips — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eEvery size is listed with its own price\u003c\/p\u003e\n\u003cp\u003eUniversal parts fail when the size is wrong. The table below carries every variant and what it costs, so you can check the OD against your pipe before paying.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eHow the part actually works\u003c\/p\u003e\n\u003cp\u003eA universal component does a mechanical job — routing, silencing, or joining. The notes below explain what it does and what the installer still has to solve.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eWhat is not included, said up front\u003c\/p\u003e\n\u003cp\u003eClamps, brackets, vacuum line and hardware are usually not in the box on universal parts. We list what ships so nothing is discovered mid-install.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Car-Exhaust-Pipe-Carbon-Fiber-Mirror-Polished.png?v=1792540533\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust Tips — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003eConfirm your vehicle year, engine and connection dimensions before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__details\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Car-Exhaust-Pipe-Carbon-Fiber-Mirror-Polished.png?v=1792540533\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust Tips — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eDetail view\u003c\/h3\u003e\n\u003cp\u003eClose-up reference for the finish and connection area.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eExhaust tip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$76.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWeld-in or clamp-on, installer adapts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eMeasure the pipe and the space for the body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eCut and test-fit before welding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eRoute any vacuum line first, with a check valve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eWeld, then leak-check before the first drive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhat size do I need?\u003c\/summary\u003e\u003cp\u003eMeasure your pipe outside diameter and compare it to the variant list. The table shows 1 option with the price for each — sizing is the whole decision on a universal part.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs hardware included?\u003c\/summary\u003e\u003cp\u003eNormally not: clamps, brackets and vacuum line are supplied by the installer. The box contents row on this page states what actually ships.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I install it myself?\u003c\/summary\u003e\u003cp\u003eIf you can weld and you have space for the body, yes. Where the part is weld-in, plan the fabrication before ordering — a universal part is a starting point, not a bolt-on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it be returned?\u003c\/summary\u003e\u003cp\u003eUnused and unmodified, yes. Once welded or heat-cycled it cannot come back, because the part is permanently changed.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260071366791,"sku":"JSH-B58-EXHAUSTT-15","price":76.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Car-Exhaust-Pipe-Carbon-Fiber-Mirror-Polished.png?v=1792540533"},{"product_id":"bmw-3-4-series-b58-catback-ss304","title":"BMW 3 \/ 4 Series (B58) Catback — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Catback — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eDesigned around BMW 3 \/ 4 Series (B58): factory hanger points and flange positions, so it bolts on instead of being fabricated on. Send the VIN and we confirm the part before dispatch.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/A4ee9f38ed70f41e28c57d5d04c533e29b.webp?v=1792674382\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58), not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/A4ee9f38ed70f41e28c57d5d04c533e29b.webp?v=1792674382\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58)\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58)\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/A4ee9f38ed70f41e28c57d5d04c533e29b.webp?v=1792674382\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$827.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58). Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260074119303,"sku":"JSH-B58-CATBACK-16","price":827.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/A4ee9f38ed70f41e28c57d5d04c533e29b.webp?v=1792674382"},{"product_id":"bmw-3-4-series-b58-valved-exhaust-system-ss304","title":"BMW 3 \/ 4 Series (B58) Valved Exhaust System — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBMW\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Exhaust System — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eBMW 3 \/ 4 Series (B58) Valved Exhaust System\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/304-Stainless-Steel-Valved-for-Back-Exhaust.png?v=1792540608\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Exhaust System — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eEvery size is listed with its own price\u003c\/p\u003e\n\u003cp\u003eUniversal parts fail when the size is wrong. The table below carries every variant and what it costs, so you can check the OD against your pipe before paying.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eHow the part actually works\u003c\/p\u003e\n\u003cp\u003eA universal component does a mechanical job — routing, silencing, or joining. The notes below explain what it does and what the installer still has to solve.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eWhat is not included, said up front\u003c\/p\u003e\n\u003cp\u003eClamps, brackets, vacuum line and hardware are usually not in the box on universal parts. We list what ships so nothing is discovered mid-install.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/304-Stainless-Steel-Valved-for-Back-Exhaust.png?v=1792540608\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Exhaust System — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003eConfirm your vehicle year, engine and connection dimensions before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__details\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/304-Stainless-Steel-Valved-for-Back-Exhaust.png?v=1792540608\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Exhaust System — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eDetail view\u003c\/h3\u003e\n\u003cp\u003eClose-up reference for the finish and connection area.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eExhaust valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$892.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWeld-in or clamp-on, installer adapts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eMeasure the pipe and the space for the body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eCut and test-fit before welding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eRoute any vacuum line first, with a check valve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eWeld, then leak-check before the first drive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhat size do I need?\u003c\/summary\u003e\u003cp\u003eMeasure your pipe outside diameter and compare it to the variant list. The table shows 1 option with the price for each — sizing is the whole decision on a universal part.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs hardware included?\u003c\/summary\u003e\u003cp\u003eNormally not: clamps, brackets and vacuum line are supplied by the installer. The box contents row on this page states what actually ships.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I install it myself?\u003c\/summary\u003e\u003cp\u003eIf you can weld and you have space for the body, yes. Where the part is weld-in, plan the fabrication before ordering — a universal part is a starting point, not a bolt-on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it be returned?\u003c\/summary\u003e\u003cp\u003eUnused and unmodified, yes. Once welded or heat-cycled it cannot come back, because the part is permanently changed.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260076445831,"sku":"JSH-B58-VALVEDEX-17","price":892.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/304-Stainless-Steel-Valved-for-Back-Exhaust.png?v=1792540608"},{"product_id":"bmw-3-4-series-b58-catback-ss304-18","title":"BMW 3 \/ 4 Series (B58) Catback — SS304 (18)","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Catback — SS304 (18)\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eA stainless 304 catback system for BMW 3 \/ 4 Series (B58). Nothing is cut or welded during the install, and the factory system can go back on.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-Catback-Exhaust-System.png?v=1792540647\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58), not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-Catback-Exhaust-System.png?v=1792540647\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58)\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58)\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-Catback-Exhaust-System.png?v=1792540647\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$512.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58). Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260078313607,"sku":"JSH-B58-CATBACK-18","price":512.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/High-Flow-Stainless-Steel-Catback-Exhaust-System.png?v=1792540647"},{"product_id":"bmw-3-4-series-b58-catback-ti-gr2","title":"BMW 3 \/ 4 Series (B58) Catback — Ti Gr2","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Catback — Ti Gr2\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eDesigned around BMW 3 \/ 4 Series (B58): factory hanger points and flange positions, so it bolts on instead of being fabricated on. Send the VIN and we confirm the part before dispatch.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Factory-Price-Titanium-Alloy-Catback-Exhaust-for.png?v=1792540678\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58), not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eGr2 titanium — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Factory-Price-Titanium-Alloy-Catback-Exhaust-for.png?v=1792540678\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58)\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58)\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Factory-Price-Titanium-Alloy-Catback-Exhaust-for.png?v=1792540678\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eGr2 titanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,190.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58). Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260081721479,"sku":"JSH-B58-CATBACK-19","price":1190.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Factory-Price-Titanium-Alloy-Catback-Exhaust-for.png?v=1792540678"},{"product_id":"bmw-3-4-series-b58-axle-back-ss304","title":"BMW 3 \/ 4 Series (B58) Axle Back — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eAxle-Back\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Axle Back — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eBuilt for BMW 3 \/ 4 Series (B58) specifically. Fitment is confirmed against your VIN — because on a vehicle part, the fit is the product.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Smooth-Finish-Exhaust-Midpipe-for.png?v=1792540710\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Axle Back — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58), not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Smooth-Finish-Exhaust-Midpipe-for.png?v=1792540710\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Axle Back — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58)\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58)\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Smooth-Finish-Exhaust-Midpipe-for.png?v=1792540710\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Axle Back — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eAxle-back system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$340.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this axle-back system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58). Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260082016391,"sku":"JSH-B58-AXLEBACK-20","price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Smooth-Finish-Exhaust-Midpipe-for.png?v=1792540710"},{"product_id":"bmw-3-4-series-b58-exhaust-system-ss304","title":"BMW 3 \/ 4 Series (B58) Exhaust System — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBMW\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Exhaust System — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eCut-to-fit material for exhaust work: spec matrix by size, weld prep guidance, and the grade stated for each option.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Exhaust-System-1-5mm-Thick.png?v=1792541066\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust System — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eDimensions per variant, priced per variant\u003c\/p\u003e\n\u003cp\u003eFabrication buyers compare numbers, not adjectives. Each size carries its own price and its own row, so a quote does not need a follow-up email.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 and how to weld it\u003c\/p\u003e\n\u003cp\u003eThe grade decides filler, purge and heat input. Getting that wrong is how a good part becomes a failed joint, so the weld notes are on the page.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStock counts and real dimensions\u003c\/p\u003e\n\u003cp\u003eWe publish what is actually in stock and what each option measures, so a quote does not depend on an email reply.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Exhaust-System-1-5mm-Thick.png?v=1792541066\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust System — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003eConfirm your vehicle year, engine and connection dimensions before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__details\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Exhaust-System-1-5mm-Thick.png?v=1792541066\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Exhaust System — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eDetail view\u003c\/h3\u003e\n\u003cp\u003eClose-up reference for the finish and connection area.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eExhaust component\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$827.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeld prep\u003c\/td\u003e\n\u003ctd\u003eSquare cut, deburred\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eMeasure twice against your drawing or the old part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eCut square and deburr before welding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003ePurge and use the correct filler for the grade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eCheck alignment after welding, not before.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eHow do I weld stainless 304?\u003c\/summary\u003e\u003cp\u003eTitanium needs full argon purge inside and out with dedicated tooling. Inconel takes nickel filler and a slower puddle. 304 welds with 308L and no purge. The grade is in the spec table above.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I return cut material?\u003c\/summary\u003e\u003cp\u003eNo. Uncut and in original packaging, yes. Cutting is irreversible, so confirm the size first.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\u003cp\u003eSend your vehicle year, engine and a photo of the mounting area. We will confirm the fitment boundary before you order.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs professional installation recommended?\u003c\/summary\u003e\u003cp\u003eYes. These parts are built for performance exhaust work and should be installed by a qualified technician.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260095451271,"sku":"JSH-B58-EXHAUSTS-23","price":827.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Stainless-Steel-Exhaust-System-1-5mm-Thick.png?v=1792541066"},{"product_id":"bmw-3-4-series-b58-single-midpipe-ss304","title":"BMW 3 \/ 4 Series (B58) Single Midpipe — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eMidpipe\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Single Midpipe — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eA stainless 304 midpipe for BMW 3 \/ 4 Series (B58) Single. Nothing is cut or welded during the install, and the factory system can go back on.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Mid-Pipe-for-M340i-G20-3-0t.png?v=1792541106\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Single Midpipe — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Single, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Mid-Pipe-for-M340i-G20-3-0t.png?v=1792541106\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Single Midpipe — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Single\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Single\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Mid-Pipe-for-M340i-G20-3-0t.png?v=1792541106\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Single Midpipe — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eMidpipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Single\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$321.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this midpipe fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Single. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260095975559,"sku":"JSH-B58-MIDPIPE-24","price":321.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Mid-Pipe-for-M340i-G20-3-0t.png?v=1792541106"},{"product_id":"bmw-3-4-series-b58-valved-catback-ss304-25","title":"BMW 3 \/ 4 Series (B58) Valved Catback — SS304 (25)","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Catback — SS304 (25)\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eA stainless 304 catback system for BMW 3 \/ 4 Series (B58) Valved. Nothing is cut or welded during the install, and the factory system can go back on.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Exhaust-for-for-BMW-8.png?v=1792541145\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Valved, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Exhaust-for-for-BMW-8.png?v=1792541145\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Valved\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Exhaust-for-for-BMW-8.png?v=1792541145\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,580.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Valved. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260097941639,"sku":"JSH-B58-VALVEDCA-25","price":1580.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Exhaust-for-for-BMW-8.png?v=1792541145"},{"product_id":"bmw-3-4-series-b58-valved-catback-ti-gr2","title":"BMW 3 \/ 4 Series (B58) Valved Catback — Ti Gr2","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Catback — Ti Gr2\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eDesigned around BMW 3 \/ 4 Series (B58) Valved: factory hanger points and flange positions, so it bolts on instead of being fabricated on. Send the VIN and we confirm the part before dispatch.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Titanium-Valvetronic-Catback-Exhaust-for-BMW-G20.png?v=1792541179\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Valved, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eGr2 titanium — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Titanium-Valvetronic-Catback-Exhaust-for-BMW-G20.png?v=1792541179\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Valved\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Titanium-Valvetronic-Catback-Exhaust-for-BMW-G20.png?v=1792541179\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eGr2 titanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,389.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Valved. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260098728071,"sku":"JSH-B58-VALVEDCA-26","price":1389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Titanium-Valvetronic-Catback-Exhaust-for-BMW-G20.png?v=1792541179"},{"product_id":"bmw-3-4-series-b58-valved-catback-ti-gr2-27","title":"BMW 3 \/ 4 Series (B58) Valved Catback — Ti Gr2 (27)","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Catback — Ti Gr2 (27)\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eDesigned around BMW 3 \/ 4 Series (B58) Valved: factory hanger points and flange positions, so it bolts on instead of being fabricated on. Send the VIN and we confirm the part before dispatch.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Titanium-Exhaust-System-for-8.png?v=1792541217\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Valved, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eGr2 titanium — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Titanium-Exhaust-System-for-8.png?v=1792541217\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Valved\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Titanium-Exhaust-System-for-8.png?v=1792541217\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eGr2 titanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,550.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Valved. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260101316743,"sku":"JSH-B58-VALVEDCA-27","price":1550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Performance-Valvetronic-Titanium-Exhaust-System-for-8.png?v=1792541217"},{"product_id":"bmw-3-4-series-b58-valved-catback-ss304-2018-2024","title":"BMW 3 \/ 4 Series (B58) Valved Catback — SS304 — 2018-2024","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eCat-Back System\u003c\/p\u003e\n\u003ch2\u003eBMW 3 \/ 4 Series (B58) Valved Catback — SS304 — 2018-2024\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eBuilt for BMW 3 \/ 4 Series (B58) Valved specifically. Fitment is confirmed against your VIN — because on a vehicle part, the fit is the product.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Exhaust-X3-X4-G01-G02-M40i-B58.jpg?v=1792541249\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 3 \/ 4 Series (B58) Valved, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Exhaust-X3-X4-G01-G02-M40i-B58.jpg?v=1792541249\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 3 \/ 4 Series (B58) Valved\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Exhaust-X3-X4-G01-G02-M40i-B58.jpg?v=1792541249\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 3 \/ 4 Series (B58) Valved Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 3 \/ 4 Series (B58) Valved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,077.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 3 \/ 4 Series (B58) Valved. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260101513351,"sku":"JSH-B58-VALVEDCA-28","price":1077.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/Exhaust-X3-X4-G01-G02-M40i-B58.jpg?v=1792541249"},{"product_id":"bmw-440i-catback-ss304","title":"BMW 440i Catback — SS304","description":"\u003cdiv class=\"tv-pdp\"\u003e\n\u003csection class=\"tv-pdp__intro\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBMW 440i\u003c\/p\u003e\n\u003ch2\u003eBMW 440i Catback — SS304\u003c\/h2\u003e\n\u003cp class=\"tv-pdp__lead\"\u003eBuilt for BMW 440i specifically. Fitment is confirmed against your VIN — because on a vehicle part, the fit is the product.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/img-mvhgfdwv-31cb8872.png?v=1792547623\u0026amp;width=1600\u0026amp;height=700\u0026amp;crop=center\" alt=\"BMW 440i Catback — full assembly\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cp class=\"tv-pdp__point\"\u003eBuilt around BMW 440i, not \"universal\"\u003c\/p\u003e\n\u003cp\u003eFactory hanger points and flange positions mean the part hangs where the original did. Nothing is cut or welded, and the factory system can be refitted later.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eStainless 304 — stated, not implied\u003c\/p\u003e\n\u003cp\u003eThe grade decides how it handles heat cycling and road salt. Buyers can verify it in five seconds with a magnet on austenitic stainless, and we say what the part is made of.\u003c\/p\u003e\n\u003cp class=\"tv-pdp__point\"\u003eOne check before the box leaves\u003c\/p\u003e\n\u003cp\u003eVehicle parts fail on fitment, not on quality. We match the VIN to the parts list first, and tell you if something does not line up rather than shipping and hoping.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature tv-pdp__feature--reverse\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/img-mvhgfdwv-31cb8872.png?v=1792547623\u0026amp;width=1000\u0026amp;height=1000\u0026amp;crop=center\" alt=\"BMW 440i Catback — detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003eBMW 440i\u003c\/strong\u003e. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u003c\/p\u003e\n\u003cdiv class=\"tv-pdp__notice\"\u003e\n\u003cstrong\u003eFitment check recommended.\u003c\/strong\u003e\u003cbr\u003e\u0026lt;p\u0026gt;Built for \u0026lt;strong\u0026gt;BMW 440i\u0026lt;\/strong\u0026gt;. Send the last seven characters of your VIN with the order and we check it against the parts list before dispatch.\u0026lt;\/p\u0026gt;\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__feature\"\u003e\u003cdiv class=\"tv-pdp__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/img-mvhgfdwv-31cb8872.png?v=1792547623\u0026amp;width=800\u0026amp;height=800\u0026amp;crop=center\" alt=\"BMW 440i Catback — installation detail\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"tv-pdp__copy\"\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eThe main item as shown. Clamps, gaskets and fitting hardware are not included unless this listing states otherwise.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__specs\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eSpecifications at a glance\u003c\/p\u003e\n\u003ch2\u003eThe details that decide the fit.\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCatback system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eBMW 440i\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eDefault Title\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$720.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003e150 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFactory hanger points, no cutting or welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment check\u003c\/td\u003e\n\u003ctd\u003eVIN matched before dispatch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__steps\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eFrom delivery to final check\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cdiv class=\"tv-pdp__step-grid\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e01 \/ MEASURE\u003c\/b\u003e\u003cp\u003eSupport the car and drop the factory section from the flange back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e02 \/ MATCH\u003c\/b\u003e\u003cp\u003eHang the new part on the factory hanger points with every clamp loose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e03 \/ FABRICATE\u003c\/b\u003e\u003cp\u003eAlign front to back, then set tip height and gaps before final torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e04 \/ TEST\u003c\/b\u003e\u003cp\u003eTorque to spec, then re-check after one heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__faq\"\u003e\u003cp class=\"tv-pdp__eyebrow\"\u003eBefore you order\u003c\/p\u003e\n\u003ch2\u003eQuestions worth answering first.\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eWill this catback system fit my car?\u003c\/summary\u003e\u003cp\u003eIt is built for BMW 440i. Send the last seven characters of your VIN and we confirm the part against the parts list before dispatch — that check is what prevents a return.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a tune or a controller?\u003c\/summary\u003e\u003cp\u003eThat depends on position. A cat-back or axle-back sits behind the sensors and needs no tune. A downpipe or header sits upstream and sensor layout is confirmed per VIN before shipping.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs anything cut or welded during the install?\u003c\/summary\u003e\u003cp\u003eNo. The system hangs on factory hanger points and joins at factory flange positions, so the original system can go back on.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWho pays import duty?\u003c\/summary\u003e\u003cp\u003eThe receiver. An estimate is shown before payment so the landed cost is not a surprise at the door.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"tv-pdp__buying-note\"\u003e\u003ch2\u003eBuild with confidence.\u003c\/h2\u003e\n\u003cp\u003eConfirm the size, fitment boundary and options before ordering. Professional installation is recommended for fabrication parts.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TITANVEIN","offers":[{"title":"Default Title","offer_id":46260639760519,"sku":"FF-440I-CATBACK-010","price":720.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/9390\/3239\/files\/img-mvhgfdwv-31cb8872.png?v=1792547623"}],"url":"https:\/\/andypethome.com\/collections\/bmw-3-4-series-b58.oembed","provider":"TITANVEIN","version":"1.0","type":"link"}