Fabspeed BMW M2/M3/M4 (G8X) Sport Cat Downpipes (2021+) Drivetrain This shortcut that the valves

This shortcut that the valves open up is not perforated

Making these headers ideal for track use or in areas with warmer climates

Fabspeed's HJS Emitec Sport Cats replace the restrictive and heavy factory catalytic converters with high-performance German-imported HD 200-cell HJS sport catalytic converters for significantly improved performance and exotic car sound

Dyno developed incrementally to give you the MAXIMUM Horsepower and superlative GT3 Cup style sports car sound

Fabspeed BMW M2/M3/M4 (G8X) Sport Cat Downpipes (2021+) Drivetrain This shortcut that the valvesGive 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 NO check engine light. There's no need to run cat