QSA 3" Front / 3" Rear LIFT KIT. Compatible with: 1999-2006 (NBS) Chevrolet Silverado 1500 / GMC Sierra 1500 See Description Below for applications Includes 1 set of 3" Lift Spindles (L+R) + 3" Rear Lift Blocks with U-bolts Includes Manufacturer's Warranty Blocks are tapered to correct for pinion angle