You will receive 2 new Pro Comp steering knuckles (1 driver & 1 passenger side). These are specifically designed for a 6" Pro Comp lift kit # k1087, k1088, and k1089. Also includes spare tire wheel spacer. ---Pro Comp part # 51802B-2 ---Driver side knuckle part # 90-4328 ---Passenger side knuckle part # 90-4329 Fitment Guide: CHEVROLET ---Silverado 2500HD 2011-2019 ---Silverado 3500HD 2011-2019 GMC ---Sierra 2500HD 2011-2019 ---Sierra 3500HD 2011-2019.
