While SuperPro bushings are always a significant upgrade; you can be limited by the condition and remaining life of the suspension arm or related component those bushings install into. For exactly that reason we have released the TRC491. Combining and OEM style complete upper control arm with an uprated ball joint and pre-fitted SuperPro bushings you save installation time and dollars and refresh the complete assembly for the best drive and longest possible service life with brand new components throughout and a straight forward factory fit. Two Complete Arm Assemblies All SuperPro Bushings pre-installed Re-designed and Up-rated Ball Joints Standard configuration