78-88 GM G-Body Non- Adjust Rear Control Arm

The 78-88 GM G-Body Non-Adjust Rear Control Arm from UMI Performance is a direct-fit replacement tubular control arm engineered for owners who demand precision suspension geometry and durability in their classic GM G-Body platforms. Built to restore and enhance the rear suspension performance of 1978–1988 Chevrolet Monte Carlo, Buick Regal, Oldsmobile Cutlass, and Pontiac Grand Prix models, this control arm addresses the compliance and wear issues inherent in original equipment. Whether you're rebuilding a street machine, preparing for autocross competition, or simply restoring ride quality and handling response, this UMI component delivers the structural integrity and alignment stability that aftermarket suspension tuning demands.

This trailing arm features a tubular steel construction with a black powder-coat finish, resisting corrosion and impact while maintaining a clean OEM appearance. The non-adjustable design preserves fixed geometry, making it ideal for vehicles where suspension angles are already dialed in or where adjustment capability is not required. Polyurethane bushings provide a balance between NVH isolation and suspension response—firmer than rubber yet more compliant than solid aluminum, they reduce bushing flex under cornering loads while maintaining ride comfort on the street. The arm measures 24.25 inches in length and weighs 10.21 pounds, making it suitable for paired installation (one per side) on the G-Body rear axle housing.

This product is sold as a pair and is compatible with all 1978–1988 GM G-Body vehicles using the factory rear suspension mounting points. Installation requires basic suspension tools and removal of the original control arms; no frame modification is necessary. Buyers benefit from the precision fit and material upgrade that comes with a purpose-built performance component, particularly those upgrading from worn OEM arms or fabricating a custom suspension setup. Pair this control arm with complimentary UMI Performance components for a comprehensive rear suspension refresh that enhances handling, reduces bump steer, and restores confidence in cornering performance.