The COBB Tuning Turboback is the ultimate power bundle for your Subaru STI or WRX hatch! Simple plug-in and bolt-on installation of these components offer excellent power gains, outstanding build quality and an impressive exhaust note. The Turboback includes: COBB 3" SS Downpipe - Cast bellmouth and high-flow catalytic converter for optimal exhaust flow; COBB 3" SS Quad-Tip Catback Exhaust - Beautiful fabrication and awesome rumble Click on the links or tabs for Downpipe and Catback to learn more about each product included in the Turboback exhaust kit.