Wulf 1-3" Front 1" Rear Leveling Lift Kit with Shock ExtendersCompatible with 2001-2010 Chevy Silverado gmc Sierra 2500HD 3500HD 8Lug 2WD 4X4Kit Information:Front:1-3" Adjustable Lift Steel Torsion KeysTwo powder-coated shock extenders for optimal ride qualityRear:1" Lift Ductile Cast Steel BlocksFour zinc-coated U-boltsHardware includedNote:Only compatible with 8Lug modelsModels with factory overload leaf spring require different U-bolts. Please contact us before placing an order to receive these at no additional charge.Don't forget to pick up a torsion key unloading tool if you don't already have one. Our tool is specifically designed to handle the job smoothly.