The Cobb Catback exhaust system is renown for providing performance, value and quality. This Cobb WRX catback is engineered to be vehicle specific and features high-quality mandrel bent stainless steel pipe and a straight- through muffler design to provide optimal performance. Cobb catback exhaust systems retain all factory emissions equipment and conform to SAE dictated 95-decibel exhaust noise level limits enforced by some states. This system is a direct bolt on design to your 2002-2007 Subaru WRX & STI. All Cobb Exhaust systems include all necessary gaskets and hardware for a simple install.