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Corsa Catback Exhaust Polished Tips WRX / STI (2011-2014) Sedan Infiniti Please take a second toThanks to their unique, unmatched muffler technology, the drone busters at Corsa Performance Exhaust have created the ideal exhaust system for your 2011 2014 Subaru WRX and STI Sedan. Corsa Sport exhaust systems for the Subaru STI employ a straight through, non restrictive design. They're coupled with their patented reflective sound cancellation science to tune out annoying low frequencies that cause droning and leave you with a crisp, clean sound.