SuperPro offers service kits for our range of fixed geometry upper control arm kits for customers that wish to rebuild or refresh their existing arm kits. Ball Joint Repair Kits include a single SuperPro Ball Joint for a single upper control arm. Two service kits are required to refresh both upper control arms. These are like-for-like replacements for the originally included ball joints for a complete replacement. Note : This ball joint suits SuperPro TRC6500, TRC6505, and TRC6730 Upper Control Arm Kits