What is the benefit of the boxed design on these control arms?

The boxed design significantly increases the strength and rigidity of the control arm. This helps to minimize suspension deflection under load, leading to crisper handling and reduced wheel hop during acceleration and cornering.

Can I still mount my factory sway bar with these control arms?

Yes, these control arms feature reinforced sway bar mounting holes with TIG welded sleeves. This allows for the mounting of factory-style sway bars, including UMI's popular 1-inch version.

What is included with these control arms?

These control arms come pre-assembled with greaseable polyurethane bushings and zinc-plated sleeves, along with reinforced sway bar mounting holes. They are finished with a durable powder coat.

UMI Performance 64-72 GM A-Body Rear Lower Control Arms Boxed

Specifications

Brand: UMI Performance
Part #: 4024-R
UPC: 4024-R

UMI Performance 64-72 GM A-Body Rear Lower Control Arms Boxed

Name: UMI Performance 64-72 GM A-Body Rear Lower Control Arms Boxed
Brand: UMI Performance
Price: 359.03 USD
Availability: InStock

$359.03

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UMI Performance boxed rear lower control arms for 1964-1972 GM A-Body. Minimizes suspension deflection for crisp handling and less wheel hop.

Key Features

Fits 1964-1972 GM A-Body vehicles.
Constructed from 2” x 1-1/2” x 1/8” wall mild steel rectangular tubing.
Boxed design adds strength and minimizes suspension deflection.
Assembled with greaseable polyurethane bushings and zinc-plated sleeves.
Reinforced sway bar mounting holes feature TIG welded sleeves.
CNC machined for accuracy and MIG welded for durability.

⚠️ 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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Product Details

Starting with 2” x 1-1/2” x 1/8” wall mild steel rectangular tubing, these boxed rear lower control arms from UMI Performance are built to handle street, strip, or track use. They are CNC machined for accuracy and MIG welded with heavy-duty bushing holders, ensuring a solid foundation for your suspension. The boxed design adds significant strength, minimizing deflection under load for more predictable handling and reduced wheel hop, especially during hard acceleration or cornering.

These control arms are assembled with greaseable polyurethane bushings, which offer a good balance of performance and durability. The sway bar mounting holes are a notable feature, reinforced with TIG-welded sleeves to accept factory-style sway bars, including UMI’s own 1-inch version. This attention to detail means you can retain or upgrade your sway bar setup while benefiting from the improved rigidity of the control arms. Finished with a durable powder coat, these arms are made in Philipsburg, PA, USA.

Designed to fit a wide range of 1964-1972 GM A-Body vehicles, such as the Chevrolet Chevelle, Buick Skylark, and Pontiac GTO, these control arms are a well-built upgrade for your classic muscle car. Installation is straightforward, typically taking about an hour with basic hand tools.