Signature Catted Downpipes w/ GESI G-Sport Cats

The Active Autowerke BMW S58 Signature Catted Downpipes are engineered to transform the driving experience of the G80 M3, G82 M4, and G87 M2. By reducing exhaust back pressure, they also contribute to a quicker and more efficient turbo spool. Constructed from durable 304 stainless steel with 1.5mm wall thickness and 3-inch diameter piping, these downpipes are built for longevity and performance. They incorporate stainless flex joints and maintain at least the stock 70mm diameter. A key feature is the integration of two 4.5-inch GESI G-Sport Ultra High Output catalytic converters. These advanced catalytic converters are EPA registered and OBD2 compliant, designed to prevent check engine lights and ensure compliance in 49 states. These GESI catalytic converters are rated to support 500 to 850 horsepower per unit and are built with a 400-cell per square inch density. They are capable of reaching operational efficiency within seconds of startup and can withstand temperatures up to 1500°F. They are made in Miami, Florida, and come with a 5-year/50,000-mile warranty on the shell and tube ends, and a 2-year/25,000-mile warranty on the catalytic core. Important considerations include: These catalytic converters are not legal for use on vehicles registered in California. Additionally, federal law prohibits tampering with emissions control devices; these downpipes are intended for repair or replacement of emissions control systems provided emissions are not adversely affected. The warranty will be voided if the vehicle exhibits excessive burble beyond stock settings, as this can physically damage the catalytic core. No performance tune is needed for installation.