Supreme Suspensions - Chevy GMC Silverado Sierra 2500 3500 Lift Leveling Kit Adjustable 1" to 3" Front + 1.5" Rear + Torsion Tool + Shock Extender Brackets 4x4 4WD PRO FITMENT: 2011 - 2018 Chevy Silverado 2500HD, 2011 - 2018 Chevy Silverado 3500HD, 2011 - 2018 GMC Sierra 2500HD and 2011 - 2018 GMC Sierra 2500HD (4WD). For models with 8-lug axle configurations. CONTENTS: 2x Cold-Forged Carbon Steel MAX-Torsion Keys, 2x Billet Aluminum Rear Lift Blocks, 4x Extended Plated Steel U-Bolts, 2x Carbon Steel Shock Extenders, 1x Carbon Steel Torsion Unloading Tool, Installation Hardware, installation Instructions and Pro Pack. TECHNICAL NOTES: 1 - 3 inch front and 1.5 inch rear suspension lift. Maintains factory ride quality. INSTALLATION: Easy installation takes 2 - 4 hours, no special tools are required. An alignment is recommended after install. BENEFITS: Improves the look of your truck and increases ground clearance, allowing you to fit larger custom rims and tires. Factory shocks can be reused. (2x) Carbon Steel Adjustable Torsion Keys (2x) Billet Aluminum Rear Lift Blocks (4x) Extended Plated Steel U-Bolts (2x) Carbon Steel Shock Extenders (1x) Carbon Steel Torsion Unloading Tool Installation Hardware Installation Instructions Supreme Suspensions Pro Pack