UMI Performance

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 race-proven lower bracket bolts in using the adjustable...

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

UMI’s adjustable rear upper control arms are a bulletproof addition to your street car. UMI’s upper control arms are suitable for street, strip or corner carving. The greaseable polyurethane...

UMI’s adjustable rear upper control arms are a bulletproof addition to your street car. UMI’s upper control arms are suitable for street, strip or corner carving. The greaseable polyurethane...

UMI’s Roto-Joint adjustable rear upper control arms are a bulletproof addition to your street or pro-touring car. UMI’s Roto-Joint upper control arms are suitable for street, strip or corner...

UMI’s Roto-Joint adjustable rear upper control arms are a bulletproof addition to your street or pro-touring car. UMI’s Roto-Joint upper control arms are suitable for street, strip or corner...

Adjustability is one the most important things when tuning in your street car's suspension. That is why we have taken the time to develop the Ultimate "on car" adjustable upper control arms for the...

Adjustability is one the most important things when tuning in your street car's suspension. That is why we have taken the time to develop the Ultimate "on car" adjustable upper control arms for the...

This kit includes (1) set of our Boxed lower control arms and (1) set of our on-car adjustable upper control arms, "Ultimate Arms". Both items are direct replacements of the OEM set up adding...

This kit includes (1) set of our Boxed lower control arms and (1) set of our on-car adjustable upper control arms, "Ultimate Arms". Both items are direct replacements of the OEM set up adding...

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...