This Signature Series 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 304 stainless steel construction for long life, and a specially designed dual inlet Signature Series "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 PVD stainless steel tips. The system includes all necessary parts and hardware for easy at home installation and is covered by our Lifetime Limited Warranty.