This kit will convert your single exhaust system to a dual exhaust system with the option of a performance muffler and dual tail pipes on your 2009-2021 Toyota Tundra 1/2 ton applications. All Wheel Bases. 8 cyl. Please note: This system is designed to replace your factory OEM exhaust starting at the flanges after/down stream of the catalytic converters. This kit does not interfere with any emissions or emission control devices nor can it be used to do such. If your exhaust has been replaced or modified previously, fabrication to the existing exhaust on your truck may be necessary for the proper installation of our kit. Trucks with modified suspension or body lifts may also require fabrication of the exhaust or truck for the proper installation of our kit. This kit is designed to fit All Wheel Bases. 8 cyl. GASOLINE ENGINES ONLY! *Product disclaimer: THIS IS NOT A COMPLETE "DO IT YOURSELF" kit. It is recommended that this kit be installed by a professional. Fabrication may be required. Any type of suspension or wheel/tire modifications may affect system clearances. Additional parts or fabrication will likely be required.