Add torque, lose a little weight and retain degrees -state smog legality with this smart header from Good-Win racing. The RoadsterSport header is designed to fit exactly as the factory header does, but with longer and equal length primary tubes to increase torque. To remain degrees -state smog legal the header is integrated with a high-flow cat to ensure exhausts gases move smoothly through the system, and is 4 lbs. lighter than the OEM unit. This header is designed to work with RoadsterSports' mid-pipe and exchaust but it also mounts to the OEM mid-pipe with no problem. Fits manual transmission and left hand drive only. Converter has two year manufacturing defect warranty. We also highly recommend pairing this header with RoadsterSport's Mid-Pipe for further improvement of sound and horsepower. Note: Not CARB approved and cannot ship to an address in the state of California.