Hummer H2 Rear Suspension Air Bag to Coil Spring Conversion Kit Pair of springs and installation instructions including details on how to disable air suspension warning light, everything necessary to convert your rear air ride suspension to coil spring system Powder coated springs will never rust Lifetime warranty unlimited mileage Please note our springs do not need any additional isolators to work correctly unlike some kits that are a universal spring with rubber spacer to make it fit, ours are application specific and guarantee to fit/ride correctly.