This IMR Test Pipe eliminates the stock cat which is one of the most restrictive sections of the OEM exhaust. The pipe and flanges are made from 304 Stainless Steel. The pipe is diameter is 3.0" to maximize flow and will accommodate the OEM and Aftermarket Catback exhaust systems. This pipe will also fit directly with the new IMR Catback System and the IMR 02 Housing and Downpipe System. Gaskets and fastening hardware are available. These pipes are fabricated in house.