Liftcraft - Chevy GMC K2500 K3500 Leveling Kit 4WD Adjustable 1 to 3 Inch Front Torsion Bar Lift Keys and Shock Extenders LIFT: 1-3 inch adjustable front suspension lift over stock FITMENT: 1988 - 1999 Chevrolet K2500 4WD, 1988 - 1999 Chevrolet K3500 4WD, 1988 - 1999 GMC K2500 4WD and 1988 - 1999 GMC K3500 4WD 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