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UMI Performance's boxed lower and tubular upper rear control arm kit for 1978–1987 GM G-Body replaces both upper and lower arms to reduce traction loss and minimize wheel hop. Fixed-length arms match GM specifications and lower arms include reinforced sway bar holes to accept stock or aftermarket bars. The combination restores consistent rear geometry and improves cornering and track consistency compared with weak stamped OEM components.
UMI Performance 78-88 GM G-Body Rear Control Arm Kit Fully Boxed Lowers
