This MACH Force XP Cat - Back exhaust system is constructed of 2 - 12 mandrel - bent stainless steel tubing and comes complete with free - flowing muffler, 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 and torque. This system produced 11 horsepower and 23 lbs. x ft. of torque over the stock exhaust system verified by our in house dyno.