Mishimoto 15+ Subaru WRX Downpipe/J-Pipe w/ Catalytic Converter (6sp Only)Mishimoto is proud to release the Performance Downpipe for the 2015+ Subaru WRX. The biggest restriction in the stock exhaust system is the downpipe. By installing the Mishimoto Performance Stainless Steel Downpipe, the FA20 DIT exhaust system is able to breathe easier, providing a significant increase in horsepower and torque when tuned. During countless dyno pulls, Mishimoto saw gains of up to 73 whp and 64 wtq with the catted downpipe, Mishimoto