UMI Performance

UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 250lb

UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 350lb

UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 450lb

UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 550lb

Installation: Easy 1-hour bolt on installation requires no drilling, uses OEM hardware.Installation: Easy 1-hour bolt on installation requires no drilling, uses OEM hardware.

Installation: Easy 1-hour bolt on installation requires no drilling, uses OEM hardware.Installation: Easy 1-hour bolt on installation requires no drilling, uses OEM hardware.

Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on the borderline of "junk", bushing deflection and rusting weak...

Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on the borderline of "junk", bushing deflection and rusting weak...

Installation: Installs in 1 hour or less using OEM hardware. All installation instructions included.

Installation: Installs in 1 hour or less using OEM hardware. All installation instructions included.

Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on the borderline of "junk", bushing deflection and rusting weak...

Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on the borderline of "junk", bushing deflection and rusting weak...

Don't reuse old rusty bolts when installing aftermarket control arms when you can replace them with new ones. Our kit includes new high grade hardware for installing your new upper and lower A-Arms...

UMI Performance 78-88 GMC G-Body Front Coilover Bracket Kit

Optional Shock Tower Brace P/N 3055- P/N 3055 is designed to tie the left and right rear shock towers together for additional chassis reinforcement. UMI’s P/N 3055 has been designed to clear most...