UMI Performance

UMI Performance single adjustable lower control arms are designed to provide rear end adjustment and reduce rear end bind. The polyurethane bushing set-up on one end and QA1 spherical rod end on the...

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’s weld-in double shear upper shock mount kit is the premium way to add a true racing coilover to the front of your G-Body. This kit includes the double shear mount, trim ring, gussets and full...

UMI’s bolt-in rear coilover bracket kit is a complete mounting solution for your Quick Performance axle in your 1978-1988 GM G-Body. This bracket features a multi-position design to allow further...

UMI Performance 78-92 GM G-Body & F-Body Front A-Arm Hardware Kit

UMI’s adjustable rear upper control arms are a reliable addition to your street car, suitable for various driving conditions. The greaseable polyurethane bushings minimize suspension deflection for...

UMI’s adjustable rear upper control arms are a reliable addition to your street car, suitable for various driving conditions. The greaseable polyurethane bushings minimize suspension deflection for...

UMI’s Roto-Joint adjustable rear upper control arms are a reliable upgrade for your street or pro-touring car. These upper control arms are suitable for various driving conditions, whether it be on...

UMI’s Roto-Joint adjustable rear upper control arms are a reliable upgrade for your street or pro-touring car. These upper control arms are suitable for various driving conditions, whether it be on...

Adjustability is crucial when it comes to tuning your street car's suspension. Our Ultimate "on-car" adjustable upper control arms for the rear of your GM vehicle have been meticulously designed with...