How do I adjust the pinion angle with this control arm?

The control arm features a 4140 heat-treated Chrome-Moly adjuster that allows for on-car adjustments. You can make changes to your pinion angle without needing to remove the arm from the vehicle, making tuning much more convenient.

What is the difference between a 3-link and a 4-link rear suspension?

A 3-link suspension typically uses one upper control arm and two lower trailing arms, often found on six-cylinder and smaller V8 engines. A 4-link suspension uses two upper control arms and two lower trailing arms, commonly found on larger V8 engines. It's important to know which your vehicle has to order the correct number of upper control arms.

Does this control arm come with hardware?

The control arm includes greaseable Energy Suspension polyurethane bushings. However, installation may require reusing some factory hardware or purchasing additional mounting bolts separately. Refer to the manufacturer's installation instructions for a complete list.

UMI Performance 67-70 GM B-Body Adjustable Upper Control/Trailing Arm

Specifications

Brand: UMI Performance
Part #: 3662-R
UPC: 3662-R

UMI Performance 67-70 GM B-Body Adjustable Upper Control/Trailing Arm

Name: UMI Performance 67-70 GM B-Body Adjustable Upper Control/Trailing Arm
Brand: UMI Performance
Price: 163.19 USD
Availability: InStock

$163.19

On Backorder

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

Fits 1967-1970 Chevrolet Bel Air. UMI Performance adjustable upper control arm to reduce wheel hop and improve handling.

Key Features

Fits 1967-1970 Chevrolet Bel Air, Biscayne, Caprice, and Impala.
Features on-car adjustability using a 4140 heat-treated Chrome-Moly adjuster.
Includes greaseable Energy Suspension polyurethane bushings for smooth operation.
Constructed with TIG welded joints for strong, reliable connections.
Built with 4140 Chrome-Moly tube adaptors for added durability.
Finished with a brilliant and durable powder coat for protection 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

The 4140 heat-treated Chrome-Moly adjuster on this UMI Performance upper control arm makes on-car pinion angle adjustments a breeze. This is a direct replacement for your 1967-1970 GM B-Body vehicle, designed to help minimize wheel hop, improve your cornering feel, and keep your tracking consistent, especially when you're pushing the car a bit harder.

Built with TIG welded construction and featuring greaseable Energy Suspension polyurethane bushings, this control arm is made to last. The durable powder coat finish not only looks good but adds a layer of protection. It's a solid option if you're looking to fine-tune your rear suspension geometry without the hassle of removing the arm from the vehicle.

Remember to check your specific vehicle's rear suspension setup, as some models came with a 3-link system (typically six-cylinder and small block engines) and others with a 4-link system (often big block engines). This part is sold individually, so be sure to order the correct quantity for your car.