The Force II Cat-back exhaust system for 2008-2013 Ford F-250/F-350 Super Duty trucks with a V8 or V10 gas engine is perfect for the person looking for mild to moderate sound levels with all of the performance benefits that you would expect from Flowmaster . This bolt-on emissions-legal system features a 50 HD Series performance muffler with large 4.00-inch internals and dual mandrel-bent 2.50-inch 409 stainless steel tailpipes for maximum performance and a deep powerful sound. The system comes with your choice of tailpipe exits and can be configured for either straight out the back under the rear bumper for a muscular look, or out the sides behind the rear wheels which is ideal for towing. The tailpipes are finished off with a pair of large 3.50-inch polished 304 stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for easy installation you can do at home.