Bilstein Shocks 5100 Series + Sierra 1500HD 2500HD 3500HD Lift Kit 1" to 3" Front Lift Torsion Keys + 3" Rear Lift Billet Blocks + Torsion Tool + Shims PRO Supreme Suspensions GMC Sierra Leveling Kit FITMENT: 2001 - 2010 GMC Sierra 1500HD (2WD 4WD), 2000 - 2010 GMC Sierra 2500HD (2WD 4WD), 2000 - 2010 GMC Sierra 3500HD (2WD 4WD). BILSTEIN SHOCKS: Bilstein 5100 Series Shock Absorbers feature a high gas pressure 46mm monotube construction with vehicle specific tuning for optimal handling performance. Their superior damping ability makes them the perfect complement to lifted trucks, allowing for heavy hauling or off-road use while maintaining a stable, controlled, and comfortable ride. FULL SIERRA LIFT KIT: Supreme Suspensions Sierra 1500HD 2500HD 3500HD lift products are meticulously crafted to work in conjunction with Bilstein shock absorbers and are guaranteed to withstand the toughest, most extreme environments. This kit comes complete with 4x Bilstein 5100 Shocks, 2x Front Lift MAX Torsion Keys, 2x Rear Lift Aircraft Billet Blocks, 4x Extended Zinc Plated U-Bolts, 1x MAX Torsion Bar Tool, 2x Axle Shims, Installation Hardware, and Installation Instructions. LIFT HEIGHT: Adjustable 1 to 3 Inch Front Suspension Leveling Lift and 3 Inch Rear Suspension Lift. TECHNICAL NOTES: Easy 'bolt-on' installation takes 3 to 4 hours. No modification is required. An alignment is recommended after install.