This durable, purpose - built, cat - back exhaust system improves clearance over rough terrain for the Jeep JK adventurist who wants it all. Large, 2 to 3 mandrel - bent 409 stainless steel tubing outflows the restrictive OE exhaust to increase torque and horsepower while a free - flowing muffler delivers a powerful, performance tone. The ROCK BASHER'S unique pre - axle turn down tip handles off - road obstacles and utilizes factory mounts for a qui ck and simple install. This cat - back exhaust system has a turn down tip under the vehicle, before the rear axle, to take on rough terrain and off - road obstacles. No more smashed tips. An 18 long, free - flowing stainless steel muffler is used to absorb high pitch tones producing a powerful sound whi le unleashing all available horsepower and torque.