UMI Performance

A spring is a spring right? Wrong! When UMI chose to manufacture our own line of springs we went all out. Designed in conjunction with a leading Sprint Cup chassis engineer, these springs are the...

UMI Performance 64-66 GM A-Body Spring/Shock Lowering Kit 1in Rear 250lbThis Part...

UMI Performance 64-66 GM A-Body Spring/Shock Lowering Kit 1in Rear 350lbThis Part...

UMI Performance 64-66 GM A-Body Spring/Shock Lowering Kit 1in Rear 450lbThis Part...

UMI Performance 64-66 GM A-Body Spring/Shock Lowering Kit 1in Rear 550lbThis Part...

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...

UMI's tubular upper control arms utilize our Roto-Joint technology for a bind free performance and quiet comfortable ride quality. The Roto-Joint design is a pivot ball lined with a greaseable...

UMI's tubular upper control arms utilize our Roto-Joint technology for a bind free performance and quiet comfortable ride quality. The Roto-Joint design is a pivot ball lined with a greaseable...

Viking’s double adjustable rear shocks feature 19 independently adjustable compression and rebound settings for a total of 361 possible valving combinations. They are a direct bolt-on and can...

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

This kit includes (1) set of our tubular single adjustable lower control arms and (1) set of our on-car adjustable upper control arms, "Ultimate Arms". Both items are direct replacements of 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 “junkâ€_x009d_, bushing deflection...

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 “junkâ€_x009d_, bushing deflection...

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...