SuperPro KIT6640K SERVICE KIT: Bushing Repair Kit - Single Arm - Fits TRC6640 & TRC6645 Upper Control Arm KitSuperPro KIT6640K SERVICE KIT: Bushing Repair Kit Single Arm Fits TRC6640 & TRC6645 Upper Control Arm Kit SuperPro offers service kits for Superpros range of fixed geometry upper control arm kits for customers that wish to rebuild or refresh their existing arm kits. Bushing Repair Kits include replacement SuperPro bushings for a single upper control arm. To service or refresh both upper control arms; two kits are required. These are press fit like for