Exhaust parts for specific chassis, not generic fitment
TITANVEIN builds titanium and stainless exhaust components for performance cars. The catalogue runs from downpipes and cat-backs through midpipes, axle-backs and exhaust tips, and extends to the fabrication stock that exhaust work actually consumes: mandrel bends, straight tube, Z and X diversion pipes, V-band ferrules, flex sections and clamps.
Everything is organised by chassis code rather than by model name. A part that fits one year of a given model frequently will not fit the next, so product pages lead with the chassis code and the engine, and the fitment note is treated as part of the specification rather than a footnote.
Materials, and why each one is used
Titanium Gr2 is commercially pure titanium: lighter than stainless, highly corrosion resistant, and the usual choice for straight tube, bends and hangers where formability matters more than ultimate strength.
Titanium Gr5 (Ti-6Al-4V) is alloyed for strength. It is used where a part carries load or sees sustained heat and vibration, such as flanges, hangers and structural sections.
Stainless 304 is the default for road exhausts. It welds cleanly, tolerates repeated heat cycles and resists surface corrosion. A light straw tint around welds after the first hard runs is normal and is not a defect.
Stainless 316 adds molybdenum for chloride resistance. It appears in our 3D-printed diversion pipes, where the internal geometry cannot be formed by bending.
Inconel 625 is stocked for high-temperature sections where 304 would fatigue.
Vehicle coverage
BMW — S55 (M3 F80, M4 F82), S58 (M3 G80, M4 G82, M2 G87, X3M F97, X4M F98), B58 and B48 (3 and 4 Series), S63 (M5 F90, X5M F95), S68 (M5 G90), plus X Series and 330i / 335i / 340i / 430i / 440i / 530i applications.
Audi — 3.0 TFSI B8 and B9 / B9.5 (S4, S5, A6, A7, A8), 4.0 TFSI C7 (S6, S7, S8, RS6, RS7), 2.5 TFSI (RS3 8V / 8Y, TTRS 8S).
Porsche — 911 991.1 and 991.2 Carrera, including 200 cell catted options.
Mercedes — M256 (GT50, GT53, E53) and W205 C63.
Also — McLaren 600LT, MINI F56 and JCW, VW Mk7 Golf R.
How the parts are specified
Mandrel bends rather than press bends, so the internal diameter stays constant through the bend. TIG welding throughout, with back-purge on stainless and titanium so the inside of the weld does not oxidise. Heat shielding where the factory part had it, because a downpipe that cooks a nearby component is not an upgrade. Valved systems where the car needs to be quiet on demand. V-band joints where the system has to come apart without cutting.
Fitment first
Most exhaust returns start with a chassis code that changed a year earlier than expected. Before ordering, confirm the chassis code, the engine and the model year. If you are between years, ask before buying rather than after — the answer is usually quick, and it is cheaper than return freight.
Emissions, stated plainly
Products are listed as catted or catless, and the cell count is given where a converter is included. Whether a given part is legal for road use depends on the market and how the local test is run; that responsibility sits with the buyer. Where a listing does not state the catalyst configuration, ask first.
Talk to us
Fitment questions, wholesale enquiries and fabrication requests all go through the contact page. Include the chassis code and the model year and you will get a specific answer rather than a catalogue link.