2x Rear Lift Blocks4x?Semi-Round Bend U-boltsInstallation instructionsPrecision CNC Machined for Outstanding Performance and Quality.Proprietary Protective Coating to Prevent Oxidation & Rust.Simple Instructions for Easy, Do It Yourself Installation!* Please check your truck's suspension setup before ordering.Some vehicles are equipped with OEM 2" or 4" rear blocks. For these models, rear lift height will vary based on the size of the factory block being replaced by our lift block.Developed and rigorously tested by in-house engineers, our rear blocks are precision machined from T6 Aircraft Aluminum and anodized to prevent oxidation & rust, ensuring a lifetime of dependability under even the most extreme riding conditions.Included in this kit is our newly designed set of premium electrostatic powder coated U-bolts, ISO 9001 certified and stamped to satisfy the highest quality control standards. NOTES: An alignment is always recommended after altering the height of your vehicle.