Fabspeed Motorsport

Fabspeed BMW M3/M4 (G80/G82) Sport Cat Downpipes (2021+)


Give your G8x M3/M4 more sound and power with our high-flow catted downpipe. Fabspeed Motorsport's engineering team consulted with HJS Motorsport and chose the largest HJS catalytic converter that would fit the G8x chassis. This guarantees the most exhaust flow, reliability, and sound. Our Sport Cat Downpipe will flow 93% of a 3'' straight pipe, all while providing emissions compliant performance and O check engine light. There's no need to run cat bypass pipes!


Fits all BMW M2, M3 & M4' (G80/G82/G87) sedan/coupe vehicles including Competition Models worldwide (2021+) (RWD & AWD)

Adds an impressive 20 WHP and 23 ft/lbs of TQ

Constructed from CNC mandrel-bent 14-16 gauge T304L stainless steel

Light weight design saves 2 lbs / 0.9 KGs compared the factory system

We use a German-made HJS HD tri-metallic 200-cell catalytic converter for the best performance and reliability

Laser scanned and CAD designed for perfect OEM fitment using Ametek Handyscan 700

No CEL (Check Engine Light) guaranteed

Simple bolt-on installation, no cutting or welding required

All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty