Supreme Suspensions - Second Generation Tundra Lift Kit 2" - 2.5" Rear Suspension Lift Carbon Steel Add-A-Leaf Kit (36" Long) + U-Bolts FITMENT: 2007 - 2018 Toyota Tundra (2WD 4WD). Only fits models with single-pin leaf packs. 2x ADD-A-LEAFS: Supreme Suspensions Add-A-Leafs are constructed from heat-treated, tempered steel and can be added to your existing leaf spring packs to increase load and towing capacity, minimize squat, and allow for larger custom rims and tires. 4x ZINC-PLATED U-BOLTS: New U-bolts eliminate flexing of the leaf spring packs and provide the desired spring stiffness for your vehicle. Our extended zinc-plated U-bolts restore this clamping force on your spring assembly, maximizing safety and ensuring that you get the most out of your rear lift. LIFT HEIGHT: This Add-A-Leaf Kit will lift the rear between 2 and 2.5 inches, depending on the condition of the factory leaf packs. It will also increase your spring rate and diminish sag while riding under heavy loads. TECHNICAL NOTES: Easy 'bolt-on' installation takes 1 to 2 hours. No special tools are required. An alignment is recommended after install.