WnP 1" - 3" Adjustable Front Lift Cast Torsion Bar Keys with Front Shock Extenders Fits: 2000 - 2010 Chevy 2500 / 3500 HD and GMC 2500 / 3500 HD Fits: 2001 - 2006 Chevy Alalanche 2500 and Suburban 2500 Cast Torision Bar Keys Bolt On Shock Extenders Lifetime Warranty