What is the benefit of UMI's Roto-Joint technology?

The Roto-Joints allow for 28 degrees of unrestricted movement, preventing suspension binding during hard cornering or over uneven surfaces. This leads to improved handling and a more comfortable ride compared to traditional bushings.

Do these control arms come with sway bar mounting provisions?

Yes, each control arm features reinforced provisions for adding a stock or aftermarket rear sway bar. These holes are sleeved with 0.120" wall thickness steel for added strength.

What is the difference between the Roto-Joint end and the polyurethane bushing end?

The Roto-Joint is designed for maximum articulation and low friction on the rear end side. The polyurethane bushing is installed on the chassis side to absorb road noise and shock, contributing to a quieter and more comfortable street ride.

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

Specifications

Brand: UMI Performance
Part #: 4041-B
UPC: 4041-B

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

Name: UMI Performance 64-72 A-Body Boxed Lower Control Arms- Poly/Roto-Joint
Brand: UMI Performance
Price: 391.67 USD
Availability: InStock

$391.67

On Backorder

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

Fits 1964-1972 GM A-Body vehicles. UMI Performance boxed lower control arms with Roto-Joints for improved traction and a comfortable ride.

Key Features

Fits 1964-1972 GM A-Body vehicles including Buick Skylark, Chevrolet Chevelle, and Pontiac GTO.
Boxed lower control arms fabricated from 3" x 1-1/2" x 1/8" rectangular steel tubing for strength.
Features UMI's Roto-Joint technology for 28 degrees of bind-free movement and improved articulation.
Includes Energy Suspension greaseable polyurethane bushings on the chassis end to absorb road noise and shock.
MIG and TIG welded construction ensures superior strength and durability.
Reinforced sway bar mounting holes are included for stock or aftermarket rear sway bars.

⚠️ 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 working on a classic GM A-body like a 1964-1972 Chevelle, Skylark, or GTO, these boxed lower control arms from UMI Performance are a solid upgrade. They're built to handle spirited driving while keeping things comfortable on the street. These arms replace your stock units, offering improved traction and reducing that annoying wheel hop you might experience under acceleration.

What sets these apart is UMI's Roto-Joint technology. Unlike standard rubber or even polyurethane bushings, the Roto-Joints allow for a full 28 degrees of movement without binding. This means your suspension can articulate freely, especially during hard cornering or when dealing with uneven road surfaces, leading to more precise handling. The arms themselves are constructed from strong 3" x 1-1/2" x 1/8" rectangular steel tubing and are MIG and TIG welded for superior strength. They also feature Energy Suspension greaseable polyurethane bushings on the chassis side, which help absorb road noise and shock before it enters the cabin, contributing to a quieter ride. Plus, they come fully assembled with reinforced sway bar mounting holes, ready to bolt on.

These control arms are designed to work with your existing sway bar hardware. The combination of the boxed construction, Roto-Joints, and polyurethane bushings offers a noticeable improvement in performance and ride quality for your classic A-body.