Liftcraft - 2007 (New) - 2018 Silverado Sierra Lift Kit 1500 2 Inch Front Aircraft Billet Strut Spacers and Differential Drop | Chevrolet Leveling Kit (Black) LIFT: 2 inch front lift over stock FITMENT: 2007 - 2018 Chevrolet Silverado 1500 4WD and 2007 - 2018 GMC Sierra 1500 1500 4WD | NOTE: Will only fit 6-lug models MATERIAL: Premium 6061T6 aircraft aluminum spacers with ideal strength and weight INSTALLATION: Bolt-on kit, only takes a couple of hours to install; No modifications required CONTENTS: Aluminum Strut spacers (2), Differential Drop Kit (1), Hardware and Detailed Instructions - Liftcraft suspension lift and leveling kits come with a lifetime guarantee and are the easiest, safest, and most affordable way to improve the look of your truck and run bigger tires <span class="a-text-bold"><u>Material</u>: </span>Premium 6061T6 aircraft aluminum spacers with ideal strength and weight. The parts also receive a protective coating to prevent rust and corrosion. 2007 - 2018 Silverado 1500 2007 - 2018 Sierra 1500 Will only fit 6-lug models Will only fit 4WD models Please note that the lift size does not equal the spacer thickness (which will be smaller), but once the installation is complete, the spacers will lift the full amount as advertised.