3-Inch High-Flow Catted Downpipe

The Evolution Racewerks Sports Series High Flow Catted Downpipe (BM-EXH038SCAT) is engineered to enhance performance for the 2025+ BMW M5 equipped with the S68 engine. Manufactured in the USA, this downpipe utilizes a 3-inch mandrel-bent piping constructed from 100% stainless steel and features 100% TIG welded seams for superior quality. This downpipe incorporates a high-flow 200-cell metallic catalytic converter, designed to significantly reduce exhaust flow restrictions compared to the factory ceramic unit. This results in higher maximum horsepower, an improved torque curve with faster spool-up, and enhanced throttle response. The precision CNC machined V-band flange ensures a precise fit to the turbocharger. Installation is designed as a 100% bolt-on process, compatible with both factory and aftermarket exhaust systems, and includes all necessary hardware. Options for finish include brush, polish, or a thermal-coated black finish to help reduce underhood temperatures. **Important Restrictions:** This product is intended for OFF ROAD COMPETITION USE ONLY and is not legal for use on pollution-controlled vehicles on public roads or highways. It is FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA. A Vehicle Compliance Waiver must be signed. This item is NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHICLES IN THE STATE OF CALIFORNIA. It is available for international customers without restriction.