Supreme Suspensions - Chevy Silverado 1500HD 2500HD 3500HD 1" to 3" Front Steel Torsion Keys + 1" Rear Billet Blocks with UBolts Full Suspension Leveling Lift Kit 4x2 4x4 Includes Shock Extenders PRO FITMENT: 2001 - 2010 Chevrolet Silverado 1500HD, 2000 - 2010 Chevrolet Silverado 2500HD and 3500HD (2WD 4WD). Fits 8-Lug Models Only CONTENTS: 2x Carbon Steel Adjustable Torsion Keys, 2x Billet Aluminum Rear Lift Blocks, 4x Plated Steel U-Bolts, 2x Carbon Steel Shock Extenders, Installation Hardware, Installation Instructions and Supreme Pro Pack TECHNICAL NOTES: 3 inch front and 1 inch rear suspension lift. Factory shocks can be reused without compromising ride quality. INSTALLATION: Easy bolt-on installation takes 2 to 4 hours. An alignment is always recommended if you are altering the height of your vehicle. BENEFITS: Improves the look of your vehicle and increases ground clearance, allowing you to fit larger custom rims and tires. (2x) Carbon Steel Adjustable Torsion Keys (2x) Billet Aluminum Rear Lift Blocks (4x) Plated Steel U-Bolts (2x) Carbon Steel Shock Extenders Installation Hardware Installation Instructions Supreme Suspensions Pro Pack