This MACH Force XP Hi - Tuck Cat - Back exhaust system is constructed of 2.5 IN mandrel - bent 409 stainless steel and comes complete with a free - flowing muffler, tubing, OE style bayonet hangers, band clamps and all hardware necessary for a hassle - free installation. 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.