Supreme Suspensions - Chevy Silverado 1500 1-3" Adjustable Front Steel Torsion Keys Front Suspension Leveling Lift Kit 4WD 4x4 6 Lug High-Strength Carbon Steel (Black) PRO CONTENTS: 2x Cold-Forged Carbon Steel MAX-Torsion Keys, Instructions and Pro Pack. FITMENTS: Chevy Silverado 1500 1997-2007 4WD; GMC Sierra 1997-2007 4WD TECHNICAL NOTES: Adjustable 1 - 3 inch front suspension lift according to your preference. Maintains factory ride quality. 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. TWICE as strong as factory keys and indexed for lift. INSTALLATION: Easy 'bolt-on' installation takes 1 - 2 hours. A torsion bar puller is required.