UMI Performance

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...

More about Roto-Joint Technology….. UMI's Roto-Joint, short for Rotational Joint, allows 28 degrees of total rotation and unrestricted movement throughout the vehicles suspension. The Roto-Joint...

More about Roto-Joint Technology….. UMI's Roto-Joint, short for Rotational Joint, allows 28 degrees of total rotation and unrestricted movement throughout the vehicles suspension. The Roto-Joint...

Improve handling and make your classic A-Body feel like a modern day muscle car by installing our P/N 4033 tubular upper a-arms. The relocated ball joint plate on these a-arms permits up to six...

Improve handling and make your classic A-Body feel like a modern day muscle car by installing our P/N 4033 tubular upper a-arms. The relocated ball joint plate on these a-arms permits up to six...

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 premium ball joints. P/N 4033-1 a-arms combine the...

Lower a-arms are assembled with UMI manufactured greaseable & fluted CNC machined zero deflection Delrin bushings for ultimate smooth suspension action

Lower a-arms are assembled with UMI manufactured greaseable & fluted CNC machined zero deflection Delrin bushings for ultimate smooth suspension action

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...

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...

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 403233-1 upper and lower a-arm...

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 403233-1 upper and lower a-arm...

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. UMI lower A-Arms are fabricated from DOM tubing...

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. UMI lower A-Arms are fabricated from DOM tubing...

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 403133 upper and lower a-arm kit...