BMR Suspension Rear Suspension Upgrade Kit Black Hammertone (RSK468H) - 1978-1987 GM G-Body
Launch harder, eliminate performance-robbing wheel hop, and add unmatched cornering consistency to your 1978 to 1987 GM G-Body with the BMR Suspension Polyurethane Non-Adjustable Rear Suspension Kit. Factory stamped-steel control arms paired with soft, deteriorating rubber bushings are notorious for flexing and deflecting under load. Instead of transferring your engine's power directly to the tires, these stock components absorb energy, resulting in severe wheel hop and unpredictable handling. BMR’s complete rear suspension kit replaces these weak links with ultra-rigid, heavy-duty components designed to plant your tires flat and keep the rear axle firmly locked in place.
Every RSK468H kit is proudly designed and manufactured in the USA using heavy-duty DOM steel tubing. The non-adjustable lower control arms are constructed from stout 1.50-inch diameter, 0.120-inch wall tubing and MIG-welded for absolute structural integrity. The non-adjustable upper control arms are built from 1.25-inch diameter, 0.120-inch wall tubing to easily withstand extreme compression loads. To tie the entire system together, BMR includes TIG-welded control arm reinforcement braces made from 1.0-inch diameter, 0.156-inch wall steel tubing. These braces significantly reinforce the upper control arm frame mounts by tying them directly to the lower mounts, drastically reducing frame deflection during hard acceleration and cornering.
To deliver an incredibly responsive driving feel without sacrificing ride quality, both the upper and lower control arms are equipped with greasable, high-density 95-durometer polyurethane bushings. These high-performance bushings feature an internally fluted design that channels grease directly to the outer thrust surfaces, keeping them fully lubricated and ensuring quiet, reliable operation. This compliance balances street-driving comfort and track performance, handling heavy drag racing launches and hard cornering with ease. Completed with premium polyurethane differential housing bushings, zinc-coated inner sleeves, and complete heavy-duty installation hardware, this kit is finished in a durable black hammertone powder coat for long-lasting protection.
Features
- Complete non-adjustable rear suspension upgrade designed for street, drag race, and road race applications
- Lower control arms built from ultra-strong 1.50-inch diameter, 0.120-inch wall DOM steel tubing (MIG-welded)
- Upper control arms built from high-strength 1.25-inch diameter, 0.120-inch wall DOM steel tubing
- Reinforcement frame braces made from 1.0-inch diameter, 0.156-inch wall steel tubing (TIG-welded) to reduce frame flex
- Equipped with greasable, internally fluted 95-durometer polyurethane bushings that trap and distribute grease efficiently
- Includes low-deflection polyurethane differential housing bushings for complete rear axle stabilization
- Zinc-coated inner sleeves provide smooth, corrosion-free bushing articulation
- Finished in a tough, resilient black hammertone powder coat for lasting durability and clean aesthetics
- Supplied with all necessary heavy-duty mounting hardware
- Straightforward bolt-on installation taking approximately 4 to 5 hours
- Proudly designed and manufactured in the USA
Fitment
Buick:
- 1978 to 1987 Buick Regal, Grand National, T-Type, GNX
Chevrolet:
- 1978 to 1987 Chevrolet El Camino
- 1978 to 1988 Chevrolet Monte Carlo, SS
- 1978 to 1983 Chevrolet Malibu
Oldsmobile:
- 1978 to 1988 Oldsmobile Cutlass, 442, Hurst/Olds
Pontiac:
- 1978 to 1987 Pontiac Grand Prix
- 1978 to 1981 Pontiac LeMans, Grand LeMans
Performance Tip: The included frame reinforcement braces strengthen the vital upper-to-lower chassis mounting points on G-Bodies, protecting the factory frame brackets from twisting or cracking under high-horsepower launches.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
