An exhaust tip is the cheapest visible change you can make to a B58 car, and the easiest one to get wrong. Not because fitting is difficult, but because “BMW 3 / 4 Series (B58)” describes an engine family spread across four body styles and two very different engines — and a tip listed for a B58 will not fit a 330i.
Quick answer: this tip is listed for the BMW 3 / 4 Series with the B58 engine, fits by clamp-on or weld-on at the listed inlet, is made from SS304 stainless, ships as one unit without clamps or gaskets, costs $76.80, and is made to order with 7–30 days before dispatch. Measure your tailpipe’s outside diameter at the seating point and confirm your chassis code and engine before ordering.
What the listing actually says
| Spec | Value |
|---|---|
| Fitment | BMW 3 / 4 Series (B58) |
| Part type | Exhaust tip |
| Material | Stainless steel 304 |
| Mounting | Clamp-on or weld-on at the listed inlet |
| Included | One tip. Gaskets, clamps and fitting hardware not included |
| Price | $76.80 |
| Lead time | Made to order, 7–30 days before dispatch |
| Warranty | One year against defects in materials and workmanship |
There is no universal inlet. Read the diameter off the listing, then read it off your own car — not off the tip you are removing.
B58 is the engine, not the body
BMW builds the B58 as a 3.0-litre turbocharged inline-six. It is the engine in the 340i and M340i, and in the 440i and M440i. It is not the engine in a 330i or 430i — those use the B48 four-cylinder, which is a different exhaust layout and a different tip listing.
That distinction matters more than the badge on the boot. Two cars that both say “3 Series” can take different tips:
- 330i / 430i — B48 four-cylinder, single or split outlet depending on market and year. Uses the B48 parts.
- 340i / M340i / 440i / M440i — B58 six-cylinder. This is the group this tip is listed for.
The body style matters less for the tip than the engine and the rear valance, but it still changes outlet count and spacing. Check the car in front of you rather than the model name in the listing:
| Body | Chassis | What changes at the rear |
|---|---|---|
| 3 Series sedan | G20 | Outlet count and spacing vary by trim and market |
| 3 Series Touring | G21 | Same engine family, different valance cutout |
| 4 Series coupé | G22 | Wider rear valance, different spacing |
| 4 Series convertible | G23 | As G22 |
| 4 Series Gran Coupé | G26 | Own rear treatment |
Chassis codes change within the same model name, and a part that fits one year often will not fit the next. Confirm chassis code, engine and model year before you order — this is the single most common reason a tip gets returned.
Clamp-on or weld-on: how to tell which you have
Look at the joint behind the existing tip. A clamp band with a bolt means clamp-on. A continuous bead of weld means weld-on.
Clamp-on is the right choice for a cosmetic change you may want to reverse. It needs enough straight pipe for the clamp band to sit flat, and enough room to get a wrench in. Check that the clamp does not land on a seam, a hanger, or the flare at the end of the pipe.
Weld-on is for custom builds, for replacing a tip that was welded from the factory, and for any application where a clamp keeps working loose. It is permanent — once welded, the tip is part of the system.
If you are choosing between the two on a standard car, clamp-on costs less to undo and is the safer default.
What is in the box, and what is not
One tip. That is the whole shipment.
Gaskets, clamps and fitting hardware are not included. Reuse your original hardware if it is serviceable. If the clamp on the car is corroded, pitted, or has been off and on a few times, add a clamp set with the order — a new tip on a tired clamp will move, and a moving tip marks the pipe and eventually cracks at the weld.
Fitting order that avoids rework
- Measure first. Outside diameter of the tailpipe at the seating point, not the decorative edge of the old tip. Two readings 90 degrees apart, use the smaller one — pipe goes out of round with heat cycles.
- Clean the pipe. Carbon and surface rust stop the clamp biting evenly. Scuff, wipe, and let it dry.
- Dry-fit before tightening anything. Check outlet position relative to the bumper cutout, and check that the tip sits level.
- Tighten, then run the car to temperature. Heat expands the joint. Re-check the clamp once the system has cooled after the first heat cycle.
- Check bumper clearance hot, not cold. A tip that clears cold plastic can touch it at operating temperature. Plastic that has been marked by a hot tip does not recover.
Measuring is the step people skip. If you have not done it before, how to measure exhaust pipe diameter covers the caliper and tape-measure methods, and the exhaust tip size guide has the circumference-to-diameter table.
What a tip will not do
It will not add meaningful power. A tip is the last few centimetres of the system. It does not change the diameter of anything upstream and does not change backpressure in a way a driver would notice.
It will not make the car louder in any meaningful way. Sound is set by the downpipe, midpipe, resonators and muffler ahead of the tip. A tip can shift the tone slightly at the outlet — the internal design is why some tips read sharper and some softer — but it will not turn a quiet system into a loud one.
If sound is the goal, the components to look at are the cat-back system and the midpipe. If the goal is the rear-end look, a tip is the cheapest correct answer.
Living with SS304
304 is the standard choice for a street exhaust. It welds cleanly, handles repeated heat cycles, and resists surface corrosion. Expect a light straw tint around the welds after the first hard runs — that is normal heat tint on 304, not a defect, and it does not mean the tip is failing.
Carbon builds up on the inside of the outlet and on the lower lip. Warm soapy water and a non-abrasive pad handle most of it. Avoid caustic wheel cleaners and abrasive metal polishes on the finish — they take the surface passivation off and the tip goes dull faster than it would have.
Comparing 304 against the cheaper 409 grades is covered in 304 vs 409 stainless.
Before you order
- Chassis code confirmed, not just “3 Series”
- Engine confirmed as B58, not B48
- Model year confirmed
- Tailpipe outside diameter measured at the seating point, in millimetres
- Inlet on the listing compared against that diameter
- Straight-pipe length checked for the clamp band
- Clamp-on or weld-on decided from the existing joint
- Replacement clamp added if the original is corroded
Frequently asked questions
Will this tip fit my 330i?
No. The 330i uses the B48 four-cylinder, and this tip is listed for the B58 six-cylinder. The B48 fitment is a separate listing.
Does it fit both the 3 Series and the 4 Series?
The listing covers the BMW 3 / 4 Series with the B58 engine. Because outlet count and bumper cutout differ between body styles and model years, confirm your chassis code and model year before ordering rather than relying on the model name.
Is it clamp-on or weld-on?
Both, for the listed inlet. It can be clamped to the existing tailpipe or welded to it.
Are clamps and gaskets included?
No. The shipment is one tip. Reuse your original hardware, or add a clamp set if yours is corroded.
How long until it ships?
Made to order, allow 7–30 days before dispatch. Every order ships with tracking.
What does the warranty cover?
One year against defects in materials and workmanship. It does not cover normal wear, accident damage, incorrect installation, or modification after delivery.
Will it change the sound of my car?
Only slightly. Sound level is set by the components upstream. A tip changes the look at the rear and can soften or sharpen the note a little depending on its internal design.
The part in this guide
BMW 3 / 4 Series (B58) Exhaust Tips — SS304 — $76.80, one unit, clamp-on or weld-on, made to order with 7–30 days before dispatch and a one-year warranty.
Browsing the range instead? The exhaust tips collection covers SS304, burnt blue and carbon finishes, and the BMW 3 / 4 Series (B58) collection has the matching downpipes, midpipes and cat-backs for the same car.
Last updated: 30 October 2026. Specifications in this article are taken from the product listing at the time of writing — always confirm against the current product page before ordering.