What is bump steer and why would I want to adjust it?

Bump steer is the tendency for a wheel to steer itself (turn in or out) as it moves up and down. Adjusting it with this kit helps keep your wheels pointed straight during suspension travel, leading to more predictable handling and improved steering feedback, especially during aggressive driving.

Does this kit come with everything needed for installation?

The kit includes the heavy duty 5/8" bolt, anodized sleeve, jam nuts, spacers, and locking nuts. However, spindle drilling is required, and you will need appropriate tools for that process and for the installation itself. Refer to manufacturer instructions for a full tool list.

Will I need to modify my tie rods to install this kit?

No, this kit is designed to fit stock 5/8" tie rods, so no modifications to your tie rods themselves are required.

UMI Performance 64-70 GM A-Body Bump Steer Adjuster Kit Heavy Duty Race

Specifications

Brand: UMI Performance
Part #: 4061-1
UPC: 4061-1

UMI Performance 64-70 GM A-Body Bump Steer Adjuster Kit Heavy Duty Race

Name: UMI Performance 64-70 GM A-Body Bump Steer Adjuster Kit Heavy Duty Race
Brand: UMI Performance
Price: 184.95 USD
Availability: InStock

$184.95

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UMI Performance 64-70 GM A-Body Bump Steer Adjuster Kit Heavy Duty Race. Reduces toe change during wheel travel for improved steering precision.

Key Features

Fits 1964-1970 GM A-Body vehicles including Buick Skylark, Chevrolet Chevelle, and Pontiac GTO.
Heavy duty 5/8" bolt and anodized aluminum hex tube allow for a wide adjustment range.
Helps reduce or eliminate toe change during wheel travel for improved steering precision.
Includes spacers (0.125”, 0.1875”, 0.250”) and locking nuts for fine-tuning.
Race quality rod ends are included for durability.
Recommended for ultra high performance use like road racing, auto-x, and high-speed drag racing.

⚠️ 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 heavy-duty 5/8" bolt and included anodized sleeve are key to this bump steer kit's wide adjustment range. This UMI Performance kit is designed to help reduce or eliminate unwanted toe changes as your wheels move through their travel, a common issue in performance driving. It's a popular choice for vehicles like the 1964-1970 Chevrolet Chevelle, 1965-1967 Buick Gran Sport, and 1964-1971 Oldsmobile 442, where precise steering response is critical.

This kit is built for serious performance use, including road racing, auto-cross, and high-speed drag racing. The race-proven design aims to improve steering precision and give you better feedback from the road. It includes spacers in various thicknesses (0.125”, 0.1875”, and 0.250”) along with locking nuts to fine-tune your alignment. Keep in mind that installing this kit requires drilling your spindle to accept the 5/8" adjustment bolt, which is a permanent modification.