TEGIWA S2000 70MM HFC Pipe. Feature high quality 304 stainless steel pipe work and flanges. The cat is a 200CEL Magnaflow unit which is identical to the top HFC brand. They have a elongated boss pre-welded into the pipe for the secondary O2 sensor are made to suit all cat back exhaust systems and headers, and will bolt in to the OEM system without modification. Installing this cat will make your exhaust system flow better and should release a bit of power. It is supplied complete with new bolts and gaskets for both flanges.