In testing, the cat-back exhaust system resulted in gains up to +9 horsepower and +19 lbs. x ft. of torque, as measured on our in-house dyno (tested on 2008 Toyota FJ Cruiser V6-4.0L). This MACH Force-Xp use all factory mounting locations providing stability and a hassle-free installation. High quality OE style flange and band clamps are used for a complete 360-degree sealing surface eliminating leak paths. A straight through designed, free-flowing stainless steel muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your rig. OE style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The Bayonet tip holds the hanger bushing in place for an OE style fit that does not change with time. This MACH Force-Xp cat-back exhaust system is constructed of 2-1/2" mandrel-bent, 409 stainless steel tubing for maximum flow. The smooth transition bends allow for low turbulence, increasing horsepower, torque and improving throttle response. This system incorporates a high flow, stainless steel performance muffler used to provide a deep, throaty, powerful sound on acceleration but maintain a smooth sound at idle. This exhaust system is finished off with a Hi-Tuck Tip that is developed to give your Jeep extra clearance during extreme angle climbs or descents. Note: Removal of the skid plate required for TRD models