The COBB Tuning SS 3" Turboback exhaust for your Subaru WRX! 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 Cat-Back Exhaust - Beautiful fabrication and awesome rumble