ReadyLIFT OEM-style rear block kits are available for model specific applications. These Rear Block Kits include two (2) 2.25 inch Rear Blocks, four (4) E-Coated U-Bolts, eight (8) Nuts and Washers and will safely lift the rear of your truck an additional 1 inch to 3 inch depending on the application. Based on OEM designs and never made out of light weight extrusions our 2.25 inch GM Blocks are made from cast iron and have anti-rotation ears built-in. Fits 1999-2018 classic and current body style 6-lug model GM trucks. 2007-2018 2WD and 4WD trucks with OEM 1.25 inch blocks will want to take advantage of the additional 1 inch of lift for towing and hauling, particularly when using a front leveling kit. This block is 2.25 inch which, when removing the factory 1.25 inch block, results in 1 inch of increased rear lift. 1999-2006 2WD trucks [which have no rear block] will to take advantage of 2.25 inch lift using the 66-3002 ReadyLIFT Rear Block Kit. This kit eliminates the dangers of having to stack blocks which may be illegal in some states. 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. Like all ReadyLIFT products these block kits come with our Lifetime Warranty. Every ReadyLIFT Rear Block Kit comes complete with one pair of OEM- quality e-coated cast iron rear blocks, model and size-specific U-bolts, hardware and instructions. This product ships in approximately 1 days