Active Autowerke Catted Downpipes for BMW S55

Boost the performance of your BMW S55 with the Active Autowerke Catted Downpipes. Designed for the F87 M2 Competition, F80 M3, and F82/F83 M4, these downpipes feature GESI Gen 2 400-cell high-flow catalytic converters for improved exhaust flow, quicker turbo response, increased horsepower, and reduced backpressure—all while helping prevent check engine lights on most applications. Features Fits BMW F87 M2 Competition, F80 M3 & F82/F83 M4 (S55) GESI Gen 2 400-cell high-flow catalytic converters Helps prevent check engine lights (CEL) Faster turbo spool and improved throttle response TIG-welded 304 stainless steel construction Direct bolt-on installation Accepts factory O2 sensor heat shields EPA compliant in 49 states (Not legal in California) 5-Year / 50,000-Mile catalytic converter warranty Made in Miami, Florida