Suspension and Components Front Suspension Components

UMI PERFORMANCE

UMI Performance 64-72 GM A-Body Front Upper A-arms Adjustable 0.9in Taller Ball Joints

$749.99

SKU: U01C 4056-3-R

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 4056-3-R

Today's Pro Touring A-bodies are handling like never before. Achieve your goal of awesome handling with UMI's new adjustable upper a-arm. This arm precisely locates a 0.9" taller upper ball joint which in turn improves the camber curve and results in more front end grip. The advanced design of the a-arm also relocates the ball joint plate rearward for increased caster and improved steering feel. The machined CrMo cross shaft holds two precision rod ends which are used to adjust the arm sections. These arms are TIG welded to the laser cut ball joint pad which houses a 0.9" taller upper ball joint. A laser cut bump stop brace completes the arm. If used for drag racing, the 4056-3 can also accommodate a travel limiter. The 4056-3 a-arm is designed to work with factory height spindles and increases spindle height by 0.9". The 4056-3 a-arm set is available in beautiful red or black powder coat and is hand built in Philipsburg, PA - USA of US materials.

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

Today’s Pro Touring A-bodies are now equipped with UMI’s latest adjustable upper a-arm for improved handling. This a-arm features a 0.9” taller upper ball joint that enhances the camber curve, resulting in increased front end grip. Additionally, the advanced design of the a-arm relocates the ball joint plate for greater caster and improved steering feel. The CrMo cross shaft holds two precision rod ends for easy adjustments, while the arm is TIG welded for strength and durability. The a-arm set is available in red or black powder coat and is hand built in the USA using high-quality materials. The Upper A-Arm hardware kit (Part # 4003) includes Grade 8 bolts, washers, and nylock nuts needed for mounting the a-arms to your vehicle. Important note: The UMI 4056-3 upper a-arm is recommended for use with lowered cars and may not be suitable for cargo coils or above stock height vehicles. Compatibility with other components should be verified before installation.

Fitment

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Specifications

BrandUMI PERFORMANCE
Part NumberU01C 4056-3-R

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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