This MACH Force - Xp Hi - Tuck cat - back exhaust system exhaust delivers pure power and sound. In testing, the cat - back exhaust system resulted in gains up to 9 horsepower and 10 lbs. x ft. of torque, as measured on our in - house dyno (tested on 2015 GMC Canyon V6 - 3.6L). Made of 3 mandrel - bent, stainless s teel tubing for maximum flow means the smooth transition bends and free - flow stainless steel muffler allow for low turbulence, increasing horsepower, torque and improved throttle response. This exhaust system is finished off with a Hi - Tuck tip to give you extra ground clearance during extreme angle climbs or descents protecting the exhaust over rough terrain.