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UMI Performance rear control arm bolt upgrade kit for 1978–2002 GM vehicles replaces old hardware when installing aftermarket upper or lower rear control arms. The kit includes 12mm Grade 10.9 high‑grade bolts (equal in strength to American Grade 8), 12mm nylon lock nuts and washers with bright zinc plating, providing corrosion resistance and stronger fasteners for safer, more reliable rear suspension installations.
UMI Performance 78-02 GM Rear Control Arm Bolt Upgrade Kit
