WnP 1" - 3" Lift Cast Torsion Bar Keys and Rear 3" Aluminum Blocks Fits: 1988 - 1998 Chevy Silverado 1/2 ton , Tahoe, Suburban 4x4 Fits: 1988 - 1998 GMC Yukon , Denali and Suburban 1500 4wd 1" - 3" Lift Adjustable Cast Torision Bar Keys 3" Lift Extruded Aluminum Blocks w/ High Carbon Steel Ubolts Lifetime Warranty