UMI Performance

This kit is highly recommended when installing an aftermarket torque arm to the Moser 12-bolt rear end. The Moser 12-Bolt rear end is supplied with four ½” mounting holes while most aftermarket...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

Replacement rubber bump stops bolt in place of damaged or worn factory bump stops using existing mounting holes. Minor trimming of mounting flange on car is required. These bump stops are highly...

UMI Performance, Inc is proud to introduce our P/N 2047 GM F-Body bolt-in rear shock relocator kit. This kit rotates the factory style rear shock to reduce the common problem of lower shock mount...

Upgrade your vehicle's lower control arms with UMI's heavy duty tubular adjustable set up. These direct bolt-on replacements will minimize wheel hop, improve cornering, and help lower ET's for better...

Upgrade your vehicle's lower control arms with UMI's heavy duty tubular adjustable set up. These direct bolt-on replacements will minimize wheel hop, improve cornering, and help lower ET's for better...

Are you a racer on a budget? This single adjustable set-up is excellent and inexpensive improvement for your street or drag race application. This simple 20 minute installation improves handling,...

Are you a racer on a budget? This single adjustable set-up is excellent and inexpensive improvement for your street or drag race application. This simple 20 minute installation improves handling,...

Eliminate unwanted traction problems and transfer your power to the wheels by adding a UMI Performance adjustable torque arm. This aftermarket torque arm replaces the flimsy weak stock torque arm...