Liftcraft - Adjustable 1-3" Front Lift Kit For 2000-2007 GMC Sierra 1500 & Chevy Silverado 1500 4x4 6-Lug | Carbon Steel Torsion Bar Lift Keys + Shock Extenders Leveling Kit LIFT: 1-3 inch adjustable front suspension lift over stock FITMENT: 2000 - 2007(classic) Chevrolet Silverado 1500 and GMC Sierra 1500 4WD 6-LUG models MATERIAL: Made of High Strength Steel, two times the strength of your factory keys INSTALLATION: Bolt-on kit, only takes a couple of hours to install; No modifications required CONTENTS: Carbon Steel Torsion Keys (2), Steel Shock Extensions (2) 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