Liftcraft - Lift Kit for Silverado 1500HD 2500HD 3500HD 8-Lug 2WD 4WD Adjustable 1-3" Front Torsion Keys + 2 inch Rear Lift Blocks Shock Extensions and Axle Shims (Steel + T6 Billet) LIFT: 1-3 inch adjustable front and 2 inch rear suspension lift over stock FITMENT: 2001 - 2010 Chevrolet Silverado 1500HD 2WD + 4WD, 2000 - 2010 Chevrolet Silverado 2500HD and 3500HD 2WD + 4WD models | NOTE: Will fit 8-Lug models only MATERIAL: High Strength Steel Torsion Bar Lift Keys, Shock Extenders | 6061-T6 Billet Aluminum Lift Blocks and Axle Shims INSTALLATION: Bolt-on kit, only takes a few hours to install; No modifications required CONTENTS: Carbon Steel Torsion Keys (2), Aluminum Lift Blocks (2), Extended U-Bolts (4), Carbon Steel Shock Extenders (2), Aluminum Axle Shims (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