ReadyLift OEM style rear block kits are now available for model specific applications. These rear block kits include two rear blocks, four E-coated U-bolts, eight nuts and washers and will safely lift the rear of the truck an additional 1 inch to 3 inch depending on application. Based on OEM designs and never made out of light weight extrusions the 2 inch GM blocks are made from cast iron and have anti-rotation ears built-in. Fits 1999-2010 classic and new body style 6-lug model GM trucks. New model 2007-up 2 wheel drive and 4 wheel drive 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 an increased rear lift of 1 inch. 1999-2006 2WD trucks which have no rear block will want to take advantage of gaining 2.25 inch of lift using the ReadyLift rear block kit. This kit eliminates the dangers of having to stack blocks which can be illegal in some states.