Supreme Suspensions - Sierra Silverado 2500HD 3500HD Leveling Kit Adjustable 1" - 3" Front Suspension Lift MAX Torsion Keys 4x2 4x4 PRO FITMENT: 2011 - 2018 Chevy Silverado 2500HD, 2011 - 2018 Chevy Silverado 3500HD, 2011 - 2018 GMC Sierra 2500HD and 2011 - 2018 GMC Sierra 2500HD (2WD 4WD). For models with 8-lug axle configurations. CONTENTS: 2x Cold-Forged Carbon Steel MAX-Torsion Keys, Installation Instructions and Pro Pack. TECHNICAL NOTES: 1 - 3 inch front suspension lift. Maintains factory ride quality. INSTALLATION: Easy installation takes 1 - 2 hours. A torsion bar puller is required. BENEFITS: Improves the look of your truck and increases ground clearance, so you can fit larger tires. Factory shocks can be reused. TWICE as strong as factory keys and indexed for lift. Adjustable lift height lifts according to your preference. (2x) Carbon Steel Adjustable Torsion Keys Installation Instructions Supreme Suspensions Pro Pack