ReadyLift is proud to offer a safe way to lift the rear of your truck. They appreciate the fact that Chevy owners expect nothing but the best products for their rides which is why they've developed model-specific applications for Chevy vehicles. Based on OEM designs and never made out of light weight extrusions their GM Blocks are made from strong cast iron, not soft extruded aluminum. Kit includes (2) lift blocks, (4) E-coated U-bolts and (8) nuts and washers. This kit is designed to replace the facotry 2 inch rear blocks on the 99-7 trucks and provide an additional 1 inch of lift to put a slight rake into your lifted or leveled truck. The 07-09 New body style trucks will replace the factory 1.25 inch rear blocks to gain 1.75 inch additional lift. The perfect combination for use with ReadyLifts 66-3000 and 66-3085 leveling kits.