ReadyLift 4" Rear Block Kits include 2 rear blocks, 4 e-coated U-bolts, 8 nuts and washers and will safely lift the rear of your truck an additional 2 inches. ReadyLift block kits will put a slight rake back in your truck for hauling or towing and are designed to work in concert with your ReadyLift suspension leveling kit. In fact, these blocks are the ideal tow package upgrade not only for stock height vehicles, but lifted or leveled trucks too. 1 plus hour installation time.