Competition Series 4.5" Catless Downpipe

The Evolution Racewerks Competition Series 4.5" Catless Downpipe is engineered to significantly reduce exhaust restrictions, leading to higher horsepower and torque gains for B58-powered vehicles. By replacing the factory catalytic converter, this downpipe promotes a higher max horsepower power curve, an improved initial torque curve that hits faster and lasts longer, and better throttle response with faster turbo spool-up times. The larger 4.5" piping and seamless transition from the turbocharger's 4.5" outlet eliminate turbulence and backpressure often found with smaller downpipe inlets. Constructed in the USA from 100% 304-grade stainless steel, this downpipe features mandrel-bent piping and 100% TIG welds for superior quality and longevity. It includes a precision CNC-machined turbocharger V-Band flange that perfectly matches the factory turbo outlet. Options are available for a Polish Finish, Black Thermal Coating to reduce underhood temperatures and improve flow, an additional O2 sensor bung for wideband sensors, and an EGT sensor bung for EGT gauges. Hardware for installation is included, and the product comes with a limited lifetime warranty. 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 in all 49 states excluding California, and a Vehicle Compliance Waiver must be signed. The downpipe is not for sale, installation, or use on licensed vehicles in California. International customers can purchase without restriction.