WnP 1" - 3" Adjustable Front Lift Cast Torsion Bar Keys with Shock Extenders and Rear 2" Steel Blocks Fits: 2000 - 2010 Chevy 2500 / 3500 HD and GMC 2500 / 3500 HD 4x4 Trucks Cast Torision Bar Keys Bolt On Shock Extenders Fabricated Steel Blocks with a Powder Coat Finish Lifetime Warranty