UMI Performance

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 Performance. UMI's P/N 403233 upper and lower a-arm kit...

UMI's 403256-3 a-arm kit adds 1.4 inches of much needed spindle height and includes Delrin lower a-arm bushings and adjustable rod end uppers, making this our ultimate a-arm kit. This kit is for...

UMI's 403256-3 a-arm kit adds 1.4 inches of much needed spindle height and includes Delrin lower a-arm bushings and adjustable rod end uppers, making this our ultimate a-arm kit. This kit is for...

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 hardware for installing your new upper and lower A-Arms...

Don't reuse old rusty bolts when installing aftermarket A-Arms when you can replace them with new ones. Our kit includes new high grade hardware for installing your new upper A-Arms. Kit includes...

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 front tires without ruining ride quality and...

UMI’s 1-1/4" sway bar is intended for Pro-Touring, road race, auto-x and corner carving. Each bar is manufactured from CNC bent 4140 CrMo which features excellent strength and a lifetime of...

UMI’s 1-1/4" solid front sway bar is intended for Pro-Touring, road race, auto-x and corner carving. Each bar is manufactured from CNC bent 4140 CrMo which features excellent strength and a...

UMI’s 1-5/16 (33.3mm) solid front sway bar is the heavy duty version of our popular 4035 bar, and is intended for Pro-Touring, road race, auto-x and corner carving. Each bar is manufactured from...

UMI’s 1-5/16 (33.3mm) solid front sway bar is the heavy duty version of our popular 4035 bar, and is intended for Pro-Touring, road race, auto-x and corner carving. Each bar is manufactured from...

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 for installing both upper and lower rear control...

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 hardware for installing either upper or lower rear control...

UMI Performance offers one of the only on-car adjustable control arms for the rear of the GM B-Body vehicle. This rear upper control arm for the 65-66 GM B-Body is an excellent solution when...

UMI Performance offers one of the only on-car adjustable control arms for the rear of the GM B-Body vehicle. This rear upper control arm for the 65-66 GM B-Body is an excellent solution when...

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...