What is the benefit of UMI's Roto-Joint technology compared to standard bushings?

The Roto-Joints allow for significantly more suspension articulation without binding, which improves handling during aggressive driving. The Delrin race also helps absorb shock and road noise for a quieter ride than traditional spherical bearings.

Do these control arms come with all the necessary hardware for installation?

These control arms are designed to use your vehicle's original hardware for installation. They come fully assembled with the Roto-Joints and polyurethane bushings already installed.

How do I maintain the Roto-Joints and polyurethane bushings?

Both the Roto-Joints and the polyurethane bushings are greaseable. Regular greasing, as recommended by UMI Performance, will ensure smooth operation and longevity of the components.

UMI Performance 64-72 A-Body Lower Control Arms- Poly/Roto-Joint

Specifications

Brand: UMI Performance
Part #: 4038-B
UPC: 4038-B

UMI Performance 64-72 A-Body Lower Control Arms- Poly/Roto-Joint

Name: UMI Performance 64-72 A-Body Lower Control Arms- Poly/Roto-Joint
Brand: UMI Performance
Price: 359.03 USD
Availability: InStock

$359.03

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

UMI Performance 64-72 A-Body Lower Control Arms- Poly/Roto-Joint. Improves handling and ride comfort with Roto-Joint technology.

Key Features

Fits 1964-1972 A-Body vehicles including Chevrolet Chevelle, Buick Skylark, and Oldsmobile Cutlass.
Features UMI Roto-Joints with greaseable Delrin races for 28 degrees of bind-free articulation.
Includes Energy Suspension greaseable polyurethane bushings on the chassis side for improved comfort.
Constructed from 1.500" x 0.120" DOM mild steel tubing.
Fully TIG welded for strong, reliable joints.
Reinforced sway bar mounting holes with TIG-welded steel sleeves.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

If you're looking to improve the handling and ride quality of your classic A-body muscle car, these lower control arms from UMI Performance are a solid option. They're built to fit a wide range of vehicles from 1964 to 1972, including popular models like the Chevrolet Chevelle, Buick Skylark, and Oldsmobile Cutlass. These arms replace your stock components, offering a significant upgrade in suspension articulation and driver feedback.

What sets these control arms apart is the combination of UMI's Roto-Joint technology on one end and Energy Suspension polyurethane bushings on the other. The Roto-Joints use a greaseable Delrin race around a pivot ball, allowing for 28 degrees of unrestricted movement. This design prevents binding during hard cornering, which is crucial for autocross or track use, while still providing a quiet and comfortable ride on the street. The polyurethane bushings are mounted to the chassis side, helping to absorb road noise and vibrations before they enter the cabin. Constructed from 1.500" x 0.120" DOM mild steel tubing and fully TIG welded, these arms are built to last and come with reinforced sway bar mounts.

These control arms come fully assembled and ready to bolt on, using your original hardware. They also feature a durable powder coat finish for a clean look and added protection. With greaseable Roto-Joints and bushings, maintenance is straightforward, making them a great choice for both street performance and daily driving.