The American Thunder cat-back single exhaust system is perfect for the person who wants to maximize power, mileage and give your pickup some growl outside without having excessive noise in the vehicle. This cat-back system features large 4.00-inch mandrel-bent aluminized steel tubing, a PRO series performance muffler with our exclusive and proven "laminar-flow" technology giving you the performance and sound you crave. The tailpipe uses the factory hanger locations for an easy installation, and exits out the side behind the rear tire showing off the large polished 5.00-inch stainless steel tip embossed with the Flowmaster logo. This system is especially well suited for heavy load and towing applications. Designed for an easy fit, these systems use the factory hangers, includes all necessary parts and hardware for easy installation you can do at home.