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UMI Performance 1964-1972 A-Body Boxed Lower Control Arms- Poly/Roto-Joint
$359.99
  • Features:
  • Constructed of 3" x 1-1/2" x 1/8" rectangular steel tubing
  • MIG and TIG welded construction for superior strength
  • CNC machined for accurate tolerances and perfect fit
  • Spherical Roto-Joints installed
  • Energy Suspension greaseable polyurethane bushings
  • Reinforced sway bar holes
  • Shipped fully assembled and ready to install
  • Uses OEM hardware
  • Brilliant and durable powder coat finish

UMI's boxed lower control arms utilize our Roto-Joint technology for a bind free performance and quiet comfortable ride quality. The boxed control arms are fabricated from 0.120" wall thickness rectangular tubing, CNC machined drawn over mandrel bushing holders and MIG welded end caps to keep out unwanted road debris. Each control arm features the correct provisions for adding a stock or aftermarket rear sway bar, sway bar holes are reinforced with a 0.120" wall thickness steel sleeve that is TIG welded and sanded into place. The solid construction combined with the delrin lined Roto-Joints eliminate control arm flex and bushing deflection for improved traction and reduced wheel hop. The installed Roto-Joint is a pivot ball lined with a greaseable delrin race designed to offer 28 degrees of total unrestricted movement, more than adequate for a bind free, low friction operation. The Roto-Joint design improves performance over the factory rubber and aftermarket polyurethane bushings by allowing the suspension to articulate correctly, and provide precision handling. The installed UMI Roto-Joint allows rear end free movement when high handling, auto cross or road race is a concern while still being a 100% streetable setup. The installed delrin race, which lines the spherical ball, absorbs shock and road noise for a quiet and smooth operation on any street or track driven vehicle. This control arm set features polyurethane bushings on one end and UMI's swivel Roto-Joint on the other end. This set-up is designed for street performance and street enthusiast. The polyurethane bushing end is designed to be bolted to the vehicle chassis side while the Roto-Joint attaches to the rear end side. Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger compartment of the vehicle.

Features

  • Material: Steel
  • Color: Red
  • Mounting Hardware Included: No
  • Adjustable: No
  • Bushing Material: Polyurethane
  • Construction: Boxed
  • Finish: Red Powdercoated
  • Mounting Method: Bolt On
  • Pre Greased: No
  • Grease Fitting Included: Yes
  • Bushings Included: Yes
  • Grade Type: Performance
  • California Proposition 65: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Notes:

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

UMI Performance Banner

Who is UMI Performance?

UMI Performance is an aftermarket company that specializes in building high-quality suspension parts. But before they were known as a suspension manufacturer, they manufactured precision parts for major brands such as Corning Asahi, Sony, and Bell+Howell. They may have shifted industries, but their dedication to creating quality products has remained the same.

Quality Products Made In The USA

All of their products are made in-house, which allows them to control every aspect of their products. 100% made in the USA, they can maintain their high standards and create suspension parts that can tackle any street, whether it be the fast corners of a race track or the bumpy road to your grocery store.

Parts Bred From The Racetrack

UMI Performance actively participates in various racing disciplines since most of their product engineers and sales team are racers. Because of this, they can test their products through real-life racing scenarios, which helps them gather data that can help improve their products.

Easy To Install Parts

Each product is designed to replace factory-installed parts without any significant modification. It is carefully measured to ensure that it would fit perfectly into the vehicle and comes with a step-by-step instructional manual, giving their customers a hassle-free installation experience.

Purchase UMI Performance At Vivid Racing

If you are in the market for high-quality suspension parts for your vehicle, then look no further, as UMI is the brand for you. To know more about UMI, visit Vivid Racing and check out their list of products that fit your specific need.

UMI Performance warrants all UMI Performance products for a period of two (2) years from the original date of purchase.

This warranty is valid against defects in materials and workmanship for the two (2) year warranty period. It is not valid against defect resulting from, but not limited to:
    Misuse and/or abuse, neglect or accident.
    Exceeding the item(s) design limits.
    Improper installation.
    Acts of God, including lightning, floods, earthquakes, fire or high winds.
    Damage in handling, including damage encountered during shipment.
This warranty is valid for the original purchaser of the UMI Product. Warranty is not transferable or valid for second ownership.

This warranty shall be considered void if the warranted product is in any way altered, adjusted, tampered with or defaced.

The two (2) year warranty does not apply to normal wear and tear (the gradual deterioration of an asset which results naturally from use and/or age, i.e. bearings, bushings, etc.).

Non UMI manufactured parts are not covered or valid under this UMI Performance warranty.

UMI Performance cannot guarantee compatibility or performance of its products with other components used in conjunction with UMI Performance products.

UMI Performance cannot assume responsibility for any damages to UMI Products nor for claims for personal injury or property damage resulting from the use of UMI Performance's products or the improper operation thereof or consequential damages arising from the products or use of the products

.UMI Performance two (2) year warranty excludes incidental charges incurred by the end user in the event of breakage (towing, labor, installation, etc.). By their very nature, competition suspension parts are continuously expected to exceed to their limits (either by race or road use). UMI suspension components are designed to withstand intense race conditions, although it is impossible to control the quality of installation or the varying conditions in which they are used.

This warranty supersedes all other warranties and may only be modified by statement in writing, signed by UMI Performance owners/principals.

All Warranties implied by law, including the warranties of merchantability and fitness for a particular purpose, are hereby limited to the warranty period herein and shall expire at the end of such period.
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Things
Sale price None
Wholesale price $339.83
Shipping Weight: 18.00
Length: 6
Width: 6
Height: 26
Product Added At Friday 05 June, 2020
Product Modified At Wednesday 28 May, 2025
Imported By ETLOverride
Last Edited By kathi@vividracing.com
View In Admin

Emissions Info
Carb Approved -
Carb Number -
Epa Status N/A
Prop65 Yes
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber MAP Core Updated
UMI Performance $287.99 $359.99 ? $359.99 ? 2025-05-28 12:31:32


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