Supreme Suspensions - Chevy Silverado 1500HD 2500HD 3500HD 1" to 3" Front Steel Torsion Keys Suspension Leveling Lift Kit 4x2 4x4 Includes Shock Extenders PRO Fits: 2001-2010 Chevrolet Silverado 1500HD 2500HD 3500HD 2WD and 4WD Designed to Lift your front end 1 to 3 inches while maintaining factory ride quality Reduces over extending the shock piston refining the performance of your ride Kit includes: 2x Front Carbon-steel Max Torsion Keys, 2x Carbon-steel Shock Extenders, Installation Hardware,