Suspension and Components Suspension Tubes and Components

UMI PERFORMANCE

UMI Performance 82-02 GM F-Body On-car Adjustable Control Arms- Poly/Roto-Joint

$299.99

SKU: U01C 2039-R

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 2039-R

UMI's on car adjustable lower control arms utilize our Roto-Joint technology for bind free performance, quiet ride quality, and also offer on car adjustment. The control arms can be adjusted longer or shorter moving the rear end back or forward to squeeze those larger tires in the fender wells. Adjustable control arms are also recommended for most aftermarket rear end installs to center the rear end and prevent tire rubbing. The installed Roto-Joint is a pivot ball lined with a greaseable delrin race designed to offer 28 degrees of total unrestricted movement, more than adequate for bind free, low friction operation. The Roto-Joint design improves performance over the factory rubber and aftermarket polyurethane bushings by allowing the suspension to articulate correctly, and provide precision handling. This control arm set features polyurethane bushings on one end and UMI's spherical Roto-Joint on the other end. This set-up is designed for street performance and street enthusiast. The polyurethane bushing end is designed to be bolted to the vehicle chassis side while the Roto-Joint attaches to the rear end side. Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger compartment of the vehicle. All bushing ends and Roto-Joints are greaseable and low maintenance making an excellent street setup for your cruiser!

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

UMI's on-car adjustable lower control arms utilize Roto-Joint technology for bind-free performance, quiet ride quality, and on-car adjustment. They can be adjusted to move the rear end back or forward for larger tires. Recommended for aftermarket rear end installs to center the rear end and prevent tire rubbing. This set features polyurethane bushings on one end (chassis side) and UMI's spherical Roto-Joint on the other (rear end side), designed for street performance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUMI PERFORMANCE
Part NumberU01C 2039-R

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy