Fabspeed M3/M4 (G80/G82) Supersport X-Pipe Valvetronic Exhaust System (21+) (FS.BMW.G8X.VLVMPB) _D915 After welding

After welding

increased throttle response

The GrimmSpeed Sound Generator Plug Kit is your solution

each STILLEN stainless steel exhaust includes a manufacturer's limited lifetime warranty

Does not alter emissions components

Fabspeed M3/M4 (G80/G82) Supersport X-Pipe Valvetronic Exhaust System (21+) (FS.BMW.G8X.VLVMPB) _D915 After weldingGet that aggressive and sharp BMW sound without any check engine lights or in cabin drone. The Supersport X Pipe Valvetronic exhaust system includes Fabspeed's high performance Valvetronic axle back section and our "Double X" mid pipe that deletes the secondary catalytic converters, for the perfect combination of sound, power, and weight reduction. SOUND: This system transforms the M3 M4 into a proper sounding monster. Youll actually hear some turbo