Rear Coil-Over Converson Brackets

The UMI Performance Rear Coil-Over Conversion Brackets (Part No. 3623) are bolt-on steel suspension components designed to retrofit GM B-Body vehicles from 1978 through 1996 with modern coil-over shock technology. These brackets enable upgrading aging leaf spring suspension geometry to independent coil-over damping, a transformation that fundamentally improves ride quality, load control, and handling dynamics for street, strip, or off-road driving.

Constructed from structural steel and finished in black powder coat, the brackets provide corrosion resistance and a clean factory appearance. The kit is engineered as a direct bolt-on solution, minimizing fabrication work and compatibility issues. Weighing 4.93 lbs, the rear conversion bracket set integrates with factory attachment points while accommodating modern coil-over assemblies. This approach preserves the original mounting architecture of the B-Body frame while enabling precision suspension tuning through adjustable shock valving and spring rates.

Buyers restoring or upgrading classic Chevrolet, Buick, Oldsmobile, or Pontiac B-Body platforms—including Chevelles, Malibus, Skylarks, and Cutlasses—rely on coil-over conversion brackets to achieve modern suspension performance without complete frame modification. The rear conversion allows independent tuning of ride height, damping, and spring preload, critical for vehicles seeing serious driving duty. This bracket system pairs with front coil-over conversions to deliver balanced geometry and predictable cornering behavior.

UMI Performance specializes in bolt-on suspension upgrades for classic American muscle and performance cars, with decades of market presence in the restoration and performance aftermarket. The rear coil-over conversion bracket represents the practical engineering standard for B-Body suspension modernization, widely accepted by restoration shops, performance builders, and enthusiasts pursuing both street and track applications.