UMI Performance

UMI's new pro-touring kit features all of our top of the line Pro-Tour style components in one convenient package. The lower arms are loaded with Roto-Joints on each end and feature TIG welded...

UMI’s bolt-in rear coilover bracket kit is a complete mounting solution for your factory axle 1978-1988 GM G-Body. This race-proven lower bracket bolts in using the standard trailing arm mounting...

UMI’s bolt-in rear coilover bracket kit is a complete mounting solution for your factory axle 1978-1988 GM G-Body. This race-proven lower bracket bolts in using the standard trailing arm mounting...

This kit replaces both the rear upper and lower rear control arms on any 78-87 GM G-Body. Kit is designed to reduce traction loss and minimize wheel hop found with stock control arms. Control arms...

This kit replaces both the rear upper and lower rear control arms on any 78-87 GM G-Body. Kit is designed to reduce traction loss and minimize wheel hop found with stock control arms. Control arms...

UMI’s rear control arm kit is a bulletproof addition to your car. Suitable for street, strip or corner carving, this kit minimizes suspension deflection for a crisp handling setup and less wheel...

UMI’s rear control arm kit is a bulletproof addition to your car. Suitable for street, strip or corner carving, this kit minimizes suspension deflection for a crisp handling setup and less wheel...

UMI’s P/N 3061 G-Body frame notch kit allows for narrowing the rear upper frame rails on the G-Body for installation of a wider tire. Laser cut 1/8” premium steel follows the frame contour (with some...

Wheel hop or traction issues? We have the solution! Optimize your vehicle's instant center and improve forward traction by lowering the rear of the lower control arm. This trailing arm and...

Wheel hop or traction issues? We have the solution! Optimize your vehicle's instant center and improve forward traction by lowering the rear of the lower control arm. This trailing arm and...

Wheel hop or traction issues? We have the solution! Optimize your vehicle's instant center and improve forward traction by lowering the rear of the lower control arm 2", 2-3/4", or 3-1/4". These...

Wheel hop or traction issues? We have the solution! Optimize your vehicle's instant center and improve forward traction by lowering the rear of the lower control arm 2", 2-3/4", or 3-1/4". These...