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UMI Performance 1978-1988 GM G-Body, 1982-2003 S10/S15 Front Lower A-arms, Coilover Only - 3057-1-R
UMI Performance 1978-1988 GM G-Body, 1982-2003 S10/S15 Front Lower A-arms, Coilover Only - 3057-1-R - Image 2 UMI Performance 1978-1988 GM G-Body, 1982-2003 S10/S15 Front Lower A-arms, Coilover Only - 3057-1-R - Image 2
  • Features:
  • 1-??" and 1-?? USA DOM tubing construction.
  • CNC laser cut components throughout.
  • 10 degrees caster potential when combined with UMI 3056 upper a-arm.
  • Removable double shear mount to allow spring/shock replacement without removing spindle.
  • Adjustable steering stop.
  • Smooth travel Delrin bushings, UMI designed and machined.
  • Saves 3.2lbs per set as compared to stock stamped a-arms.
  • Suitable for competition use. Road race, auto-x, drag race, street corner carving.
  • Designed, tested, manufactured and raced in Philipsburg, PA-USA.

UMI's 3057-1 lower a-arms arms feature a relocated ball joint cup which offers 10 degrees caster when used with our P/N 3056 upper arm while keeping the spindle pin centered. The 3/4 taller Howe ball joint works to optimize the roll center, lower the center of gravity and lowers the ride height ??. The double shear shock mount is removable which permits spring and shock changes at the track in minutes without disconnecting the ball joints. An aluminum steering stop is adjustable and limits steering lock to prevent tire and wheel damage. UMI designed Delrin bushings help the 3057-1 travel smoothly for bind-free operation whether running street, strip, road race or auto-x. Also included is a double shear sway bar mounting system which accepts UMI sway bars and many other manufacturers stock location aftermarket units. Available in UMI red or black powder coat. 100% designed, manufactured and raced with pride in the USA. Battle tested on the iconic UMI Green Machine

Performance note: UMI recommends adding the P/N 3060 bump steer kit for optimal performance. Lower a-arms work best when used in conjunction with caster corrected upper a-arms.

Mount spacing suitable for Afco, Viking, Ridetech and many other aftermarket manufacturers shock/spring combos.

Double shear swivel sway bar mounts and hardware work with UMI P/N 3035 and most other factory eyelet style sway bars.

Features

  • Material: Steel
  • Color: Red
  • Mounting Hardware Included: No
  • Adjustable: No
  • Bushing Material: Delrin
  • Bushing Color: White
  • Construction: Tubular
  • Finish: Red Powdercoated
  • Mounting Method: Bolt On
  • Pre Greased: No
  • Grease Fitting Included: Yes
  • Bushings Included: Yes
  • Ball Joint 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 $755.19
Shipping Weight: 28.00
Length: 16
Width: 19
Height: 8
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 $639.99 $799.99 ? $799.99 ? 2025-05-28 12:59:37


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