This is the Firestone Ride-Rite 2245 air helper spring kit, designed for the rear axle of 2000-2006 Toyota Tundra (including 2WD TRD and 4WD models). It fits between the vehicle’s frame and leaf springs to assist the factory suspension by allowing adjustable air pressure to counteract heavy loads.
Constructed with double-convoluted premium rubber air springs, this kit includes all necessary hardware: upper and lower brackets, air lines, inflation valves, mounting bolts, and fasteners. The air springs are rated for inflation pressures from 5 to 100 PSI, allowing for personalized stiffness depending on load.
With this kit installed, you’ll notice reduced leaf spring sag, improved stability, and more level ride height under varying loads. Braking, handling, and tire wear are all enhanced when the truck is loaded, and unbalanced loads can be sided-adjusted thanks to independent inflation valves. Ideal for towing, hauling, or just everyday driving with payloads.