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 ...

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 Sp...

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 ...

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 ...

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 ...

UMI Performance solid sway bars are designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

UMI Performance solid sway bars are designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

UMI’s 1-¼" (32mm) solid front sway bar is the go-to bar for today’s modern handling muscle car. This bar reduces body roll and helps plant the...

UMI’s 1-¼" (32mm) solid front sway bar is the go-to bar for today’s modern handling muscle car. This bar reduces body roll and helps plant the...

Our beefy 1" solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

Our beefy 1" solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

Improve handling and make your classic A-Body feel like a modern day muscle car by combining our popular P/N 4033 upper a-arms with ½" taller pr...

Improve performance and make your classic A-Body feel like a modern day muscle car with a complete set of fabricated tubular a-arms from UMI Perf...

Tired of looking at hammered, crusty lower a-arms with cracked ball joint bosses? UMI has the solution with brand new modern tubular lower a-arms....

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 borderl...

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 borderl...

Rear lower control arms are a must improvement for any General Motors A-Body vehicle. Our lower control arms our designed to replace your weak,...

Rear lower control arms are a must improvement for any General Motors A-Body vehicle. Our lower control arms our designed to replace your weak,...

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 ...

Don't reuse old rusty bolts when installing aftermarket A-Arms when they can easily be replaced with new ones. Our kit includes new high grade hard...

Don't reuse your old rusty bolts when installing aftermarket control arms when you can replace them with new one. Our kit includes all new hardware...

Don't reuse your old rusty bolts when installing aftermarket control arms when you can replace them with new ones. Our kit includes all new hardwar...

UMI’s 1-¼" (32mm) solid front sway bar greatly improves the cornering capability of the S10/S15. This bar reduces body roll and helps plant the ...

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...

This 100% jig built, bolt-in brace ties the rear upper shock mounts together to share the load and stiffen the chassis. Strong 1-1/4” tubing is ...

This 100% jig built, bolt-in brace ties the rear upper shock mounts together to share the load and stiffen the chassis. Strong 1-1/4” tubing is ...

The UMI Performance, Inc. reinforcing front frame brace is used to stiffen the front frame horns and front crossmember area on the GM G-Body pla...

The UMI Performance, Inc. reinforcing front frame brace is used to stiffen the front frame horns and front crossmember area on the GM G-Body pla...

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 ...

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 Sp...

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 ...

UMI Performance solid sway bars are designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced sus...

UMI Performance solid sway bars are designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced sus...

UMI Performance 1.250" (32mm) solid front sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a...

UMI Performance 1.250" (32mm) solid front sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a...

Our beefy 1" solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

Our beefy 1" solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspe...

UMI lower A-Arms are fabricated from USA DOM tubing with CNC notched tube ends for a precision fit. They are jig built to maintain accuracy and b...

UMI lower A-Arms are fabricated from USA DOM tubing with CNC notched tube ends for a precision fit. They are jig built to maintain accuracy and b...

UMI lower A-Arms are fabricated from USA DOM tubing with CNC notched tube ends for a precision fit. They are jig built to maintain accuracy and b...

Trailing arm mount braces are designed to reinforce the rear upper and lower front control arm mounts on your 1978-1988 G-Body vehicle. The more po...

Trailing arm mount braces are designed to reinforce the rear upper and lower front control arm mounts on your 1978-1988 G-Body vehicle. The more po...

Complete Kit Includes: (1) Set of Double Adjustable Lower Control Arms with Spherical Rod Ends (Item #3027) (1) Ser of Double Adjustable Upper Cont...

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 borde...

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 borde...

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 borde...

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 borde...

Features: - 1.500" OD x 0.120" DOM mild steel tubing - CNC machined for precision tolerances and accuracy - Fully TIG welded for superior str...