This Flow FX® Cat-back exhaust system is for 2009-2021 Toyota Tundra with 4.0L, 4.6L, 4.7L or 5.7L engine and is a bolt-on emissions legal system with a moderately aggressive exterior sound and a moderate interior tone. The system features all stainless steel construction for long life, and a specially designed dual inlet Flow FX® "straight-through" performance muffler flowing into dual 2.50-inch mandrel-bent tailpipes for maximum performance. The tailpipes exit out the sides behind the rear wheels, which is beneficial for towing, and are finished off with a pair of large 4.50-inch black ceramic coated stainless steel tips for good looks. The system includes all necessary parts and hardware for easy at home installation and is covered by our Lifetime Limited Warranty.