Samson Legend Series Exhaust System - Sidewinders - Chrome S3-966 Legendary style and function that could only come from Samson Boost horsepower and torque by up to 20% while also improving fuel efficiency Stepped headpipes run from 1 3/4in. to 2 1/4in. improving the exhaust flow 2 1/2in. full coverage heat shields Removable baffles ensure tuning requirements of todays fuel-injected motors while emitting a deep, guttural tone