The Scorpion Aluminized Hi - Tuck Rock Basher (RB) Cat - Back Exhaust System is constructed of 2 - 12 mandrel - bent aluminized steel tubing. The smooth curves and increased diameter of this exhaust system helps remove restriction and keeps exhaust gas flowing smoothly for increased horsepower, torque and throttle response. This exhaust system also comes complete with a 18 length chambered muffler, OE style bayonet hangers, band clamps and all hardware necessary for a hassle - free installation.