The Cobb Tuning Mitsubishi Evo X Downpipe features a widened diameter of 3″ for increased flow of exhaust gases from the turbo charger to allow for improved horsepower and torque. The downpipe is constructed of 304 stainless steel, mandrel bent tubing, which can be fitted to the OEM exhaust or the Cobb Tuning Evo X Test Pipe.