What is the main benefit of a fully boxed control arm compared to a factory arm?

A fully boxed design significantly increases the rigidity and strength of the control arm. This reduces flex and deflection under load, leading to more precise suspension geometry control, improved handling, and less wheel hop.

Are these control arms designed for a comfortable ride?

Yes, these control arms are assembled with greaseable polyurethane bushings. Polyurethane offers a good balance between performance and comfort, and the greaseable design allows for regular lubrication to maintain a quiet and comfortable ride.

Does this kit include everything needed for installation?

The kit includes the fully boxed lower control arms with bushings and sleeves. You will need basic hand tools for installation, and it is recommended to refer to the manufacturer's installation instructions for any specific hardware or procedures.

UMI Performance 68-72 GM A-Body Rear Control Arm Kit Fully Boxed Lowers

Specifications

Brand: UMI Performance
Part #: 402116-R
UPC: 402116-R

UMI Performance 68-72 GM A-Body Rear Control Arm Kit Fully Boxed Lowers

Name: UMI Performance 68-72 GM A-Body Rear Control Arm Kit Fully Boxed Lowers
Brand: UMI Performance
Price: 565.75 USD
Availability: InStock

$565.75

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UMI Performance fully boxed rear lower control arms for 68-72 GM A-Body. Minimizes deflection and reduces wheel hop for improved handling.

Key Features

Fits 1968-1972 GM A-Body vehicles including Chevrolet Chevelle, Buick Skylark, and Pontiac GTO.
Fully boxed lower control arms are constructed from strong 3" x 1-1/2" x 1/8" wall mild steel tubing.
Capped radius ends maintain a factory look and prevent debris entry.
Assembled with greaseable polyurethane bushings and zinc-plated sleeves for a comfortable ride.
Reinforced sway bar mounting holes with TIG-welded sleeves accommodate factory-style sway bars.
Durable black powder coat finish for longevity and appearance.

⚠️ 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

UMI Performance is known for making well-built suspension components for classic American cars. If you're working on a 1968-1972 GM A-Body, like a Chevelle, Skylark, or GTO, and want to firm up the rear suspension, these fully boxed lower control arms are a solid choice. They replace your factory arms with a stronger, more rigid design that helps keep your suspension working precisely, whether you're cruising, hitting the drag strip, or carving corners.

These aren't just beefier versions of the stock arms; they're built from 3-inch by 1-1/2-inch mild steel tubing with a 1/8-inch wall thickness. The ends are fully capped, giving them a clean, factory-like appearance while also preventing dirt and debris from getting inside. Inside, you'll find greaseable polyurethane bushings that offer a comfortable ride and are designed to last. The sway bar mounting holes are also reinforced with TIG-welded sleeves, ready to accept a factory-style sway bar, including UMI's own 1-inch version. The black powder coat finish not only looks good but also adds a layer of durability.

Installation is straightforward, typically taking about an hour with basic hand tools, and they are made right here in Philipsburg, PA. These control arms are designed to minimize suspension deflection and reduce wheel hop, giving you a more responsive feel from your rear end.