QSA 2" FORGED Adjustable Torsion Leveling Lift Keys + Shock Extenders - Compatible with 2000-2010 Chevrolet GMC 1500HD, 2500HD, 3500HD, Fits RPO Codes FK2-FK3, FF6-FF7, FF8-FF9 Codes in Glove box! Includes: Heavy Duty Forged Torsion Keys (L+R) AND Shock Extenders Allows for leveling (lifting) the Front of Your Vehicle Between 1" - 3" However, we dont recommend going above 2.5" The Keys and Extenders both have a High Quality Powder Coated Finish to Protect from Rust Easy Installation Fits: 2000 - 2010 Chevrolet Silverado and GMC Sierra 1500 HD / 2500HD / 3500HD, 2001 - 2009 Chevrolet Avalanche 2500HD (2500), 2000 - 2010 Chevrolet Suburban 2500, 2000 - 2010 GMC Yukon XL 2500