What is the primary benefit of installing these rear control arms?

These control arms minimize suspension deflection, which leads to crisper handling and less wheel hop. This results in a more responsive and stable rear suspension setup for street, strip, or corner carving.

Are the polyurethane bushings serviceable?

Yes, the kit includes greaseable polyurethane bushings. This allows for regular lubrication, which helps to maintain the bushings' integrity and extend their lifespan.

Does this kit include everything needed for installation?

The kit includes the upper and lower control arms with pre-installed bushings and sleeves. It also comes with a shim for the sway bar. Refer to the manufacturer's instructions for any additional hardware that may be required for your specific vehicle.

UMI Performance 73-77 GM A-Body Upper & Lower Control Arm Kit

Specifications

Brand: UMI Performance
Part #: 421516-B
UPC: 421516-B

UMI Performance 73-77 GM A-Body Upper & Lower Control Arm Kit

Name: UMI Performance 73-77 GM A-Body Upper & Lower Control Arm Kit
Brand: UMI Performance
Price: 511.35 USD
Availability: InStock

$511.35

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UMI Performance rear control arms for 73-77 GM A-Body. Minimizes suspension deflection for crisp handling and less wheel hop.

Key Features

Fits 1973-1977 GM A-Body vehicles including Buick Century, Chevrolet El Camino, and Oldsmobile Cutlass.
Boxed lower control arms feature reinforced sway bar mounting holes for factory-style sway bar attachment.
Upper fixed length control arms include heavy-duty ¼” thick laser-cut mounting pads for rear end housings.
Constructed from 1/8” wall thickness USA mild steel tubing.
Assembled with high-quality, greaseable polyurethane bushings and zinc-plated steel sleeves.
CNC machined for accuracy and consistency.

⚠️ 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

Starting with the heavy-duty ¼” thick laser-cut mounting pads on the upper control arms, this UMI Performance kit is built to handle the demands of street driving, drag racing, or spirited cornering. These rear control arms are designed to minimize suspension deflection, which translates to crisper handling and a noticeable reduction in wheel hop when you put the power down. This kit is a solid addition for anyone looking to improve the rear suspension performance on their 1973-1977 GM A-Body vehicle, including popular models like the Chevrolet El Camino, Oldsmobile Cutlass, and Pontiac LeMans.

The boxed lower control arms are engineered with reinforced sway bar mounting holes, allowing for factory-style sway bar attachment. A included shim ensures the sway bar sits at its original height, maintaining proper geometry. UMI uses 1/8” wall thickness USA mild steel tubing for the main construction, with CNC machining ensuring accuracy and consistency in every component. The arms are assembled using high-quality, greaseable polyurethane bushings with zinc-plated steel sleeves, offering durability and the ability to properly lubricate the bushings for long life. The entire assembly is finished with a durable powder coat for protection.

This kit is designed for a direct installation using basic hand tools, typically taking around two hours to complete. The TIG-welded sleeves reinforce the sway bar mounting points, adding another layer of strength to this well-built suspension upgrade.