Liftcraft - 2.5 Inch Front + 2 Inch Rear Lift Kit For 2005-2018 Ford F-250 F350 Super Duty 4WD Billet Aluminum Front Spring Spacers and Rear Lift Blocks LIFT: 2.5 inch front and 2 inch rear lift over stock FITMENT: 2005 - 2018 Ford F-250 Super Duty 4WD and 2005 - 2018 Ford F-350 Super Duty 4WD MATERIAL: Premium 6061T6 aircraft aluminum with ideal strength and weight INSTALLATION: Bolt-on kit, only takes a few hours to install; Extended U-Bolts are needed. CONTENTS: Billet Spring Spacers (2), Billet Lift Blocks (2), 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