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UMI Performance complete rear control arm bolt upgrade kit for 1978–1988 GM vehicles includes all hardware needed to install both upper and lower rear control arms. The kit supplies eight 12mm Grade 10.9 high‑grade bolts, eight 12mm nylon lock nuts and matching washers, all bright zinc plated to resist corrosion and provide the stronger fasteners required for safe, reliable rear suspension installations.
UMI Performance 78-88 GM Complete Rear Control Arm Bolt Upgrade Kit
