The Flowmaster® Force II® cat-back exhaust system for 2007*-2013 GM (*not classic body) Silverado/Sierra 1500 with the 5.3L engine. This bolt-on emissions-legal system features 3.00 in. mandrel-bent stainless steel tubing flowing into a Super 50™ Series muffler with a mild interior tone and a deep moderate sound level outside the cab. The dual 2.50 in. mandrel-bent stainless steel tailpipes use the factory hanger locations and can be configured with your choice of exit locations, either straight out the back under the bumper for a muscular look, or exiting out behind the rear tires on each side of the truck. The side exits are the ideal tailpipe location when towing a boat or RV. The tailpipes are finished off with large 3.00 in. polished dual-wall stainless steel tips. The system includes all necessary parts and hardware for an easy installation and is covered by our Lifetime Limited Warranty. Notes: Fits all 2007*-2008 (*except classic body) GM 1500 4.8, 5.3L 2/4 wheel drives (except Extended Cab with 8-ft bed) and all 2009-2013 GM 1500 5.3L Extended Cab with 6.5-ft bed and Crew Cabs with 5.5-ft bed Only.