78-88 GM Rear Upper/ Lower Control Arm Kit

The 78-88 GM Rear Upper/Lower Control Arm Kit from UMI Performance restores critical suspension geometry and steering response on General Motors A-body vehicles spanning model years 1978 through 1988. This complete control arm assembly addresses worn factory components that accumulate thousands of miles of suspension articulation, causing alignment drift, tire wear, and handling inconsistency. Whether you're maintaining a daily driver or restoring a performance-oriented classic, this kit eliminates the vague, unpredictable steering feel that develops in aging suspension systems and re-establishes the precision geometry your vehicle was engineered for.

This kit includes a matched set of eight components—upper and lower control arms with integrated fastening hardware—manufactured from steel in natural finish. Each assembly comes complete with 12 mm hex head control arm bolts, lock nuts, and washers, eliminating the need to source hardware separately. Steel construction ensures durability under load while maintaining original specification geometry; the natural finish allows for user-applied protective coating or powder coating to match your vehicle's restoration level. Proper installation restores factory camber and caster angles, reducing pad wear and extending tire life while improving steering input response and cornering stability.

Technicians and enthusiasts working on 1978–1988 GM models benefit from this kit's plug-and-play compatibility and complete fastener package, which streamlines installation and reduces downtime. The assembly is engineered to accept original suspension components, allowing for staged restoration or targeted suspension refresh without requiring full system replacement. Installation requires basic mechanical tools and knowledge of suspension geometry; alignment verification following installation ensures optimal tire wear patterns and handling dynamics. This control arm kit serves fleet maintenance operations, restoration shops, and individual owners seeking to recover the handling characteristics that define these classic GM platforms.