Air Lift adjustable air helper springs level your load, and give your truck, van, or SUV a safer, more comfortable ride. Air springs are easy to install between your existing springs and the vehicle frame. Just add air when towing or hauling a heavy load, and reduce air pressure when unloaded, they are fully adjustable for a great ride. Air Lift air springs eliminate sag, sway, and bottoming out. They are made with rugged, durable components for long, reliable service. LoadLifter 5000 kits are Air Lift’s heaviest-rated kits for hauling or towing heavy loads. LoadLifter 5000; Leaf Spring Leveling Kit; Rear; Not For Use w/24000 OR 26000 GVWR. Title: LoadLifter 5000; Leaf spring leveling kit. Will not fit commercial chassis vehicles.