AIRTEC Motorsport Downpipe De-Cat for BMW G Series – M2, M3 & M4 R56 Cooper S engineered to improve engine breathing

engineered to improve engine breathing for sharper throttle response and a more eager revving feel

hassle-free install on facelift F20 and F21 hatchbacks

and our customers report faultless performance

This premium cotton-gauze

AIRTEC Motorsport Downpipe De-Cat for BMW G Series – M2, M3 & M4 R56 Cooper S engineered to improve engine breathingBy removing the restrictive primary catalytic converters located in the original downpipes, back pressure is hugely reduced, which effectively improves the engines breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust note. Complete with replacement fitting kit, the downpipes will mate to a standard or aftermarket exhaust system and come wrapped in a