Supreme Suspensions - Chevy Silverado 1500HD 2500HD 3500HD 1" to 3" Adjustabl... FITMENT: 2000 - 2010 Chevy Silverado 2500HD CONTENTS: 2x Cold-Forged MAX-Torsion Keys, 1x MAX-Torsion Bar Unloading Tool, Instructions and Pro Pack. TECHNICAL NOTES: 1 - 3 inch front suspension lift. Maintains factory ride quality. For models with 8-lug axle configurations. 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. INSTALLATION: Easy installation takes 1 - 2 hours. No special tools required.