AIR LIFT 57132 LoadLifter 5000 Series Rear Air Spring Kit Fully adjustable air springs level your vehicle when towing or hauling a heavy load for a safe comfortable ride Eliminate sag and bottoming out. Air spring pressure is controlled through air line tubing that connects to the most convenient spot on your vehicles chassis Rugged durable components including air springs and all hardware Easy to install with included instructions Up to 5000 pounds of leveling capacity