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Chassis Components› Chassis and Frame Components

UMI Performance

Adjustable Upper and Lower Control Arms

Name: Adjustable Upper and Lower Control Arms
Brand: UMI Performance
SKU: UMI-301417-B

$503.78

SKU: UMI-301417-B

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The UMI Performance adjustable upper and lower control arm kit is designed for GM G-Body vehicles from 1978-1988. This kit directly replaces the OEM setup, offering enhanced strength, improved ride quality, and crucial rear-end adjustability. It includes tubular single-adjustable lower control arms and on-car adjustable upper control arms.

Show original supplier description

The UMI Performance UMI-301417-B control arm kit is engineered to enhance the rear suspension of 1978-1988 GM G-Body vehicles. Constructed from durable 1.500" x 0.120" mild steel tubing, the kit features tubular single adjustable lower control arms and "Ultimate Arms" on-car adjustable upper control arms. These components are direct bolt-on replacements for the factory parts, simplifying installation by utilizing OEM hardware. Detailed installation instructions are included to guide the process. The primary benefit of this adjustable control arm kit is the ability to fine-tune the rear suspension geometry, allowing for optimal alignment and handling characteristics. Whether for street use or performance driving, these arms provide the adjustability needed to dial in your vehicle's setup. The black finish adds a clean, performance-oriented aesthetic to the suspension. This kit is specifically designed for the GM G-Body platform, covering a range of models from 1978 through 1988. Ensure your vehicle falls within this specified fitment range for proper integration. No special hardware beyond OEM is noted as required for installation, though professional installation is recommended for optimal results and safety.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	UMI Performance
Part Number	UMI-301417-B
Category	Suspension and Components

Videos

Stage 2 Handling kit: Rear Install | G-Body Build Series | S1E3

Converging Four Links: Adjusting Pinion Angle and Side-To-Side Movement

Front Factory Suspension Removal | G-Body Build Series | S1E4

UMI Performance Rear Control Arm Options and Comparison

UMI LOWER CONTROL ARM INSTALL

G-Body UMI Rear Suspension Install w/ Bonus Burnout

Installing UMI Adjustable Lower control Arms

INSTALLING FRONT UMI UPPER AND LOWER CONTROL ARMS WITH COILOVERS

INSTALLING REAR UPPER AND LOWERS CONTROL ARMS ON ON A CHEVELLE FROM UMI PERFORMACE part2

HOW TO: 3rd/4th Gen F-Body Pinion Angle Adjustment

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UMI Performance - Bolt In Chassis Stiffening - for A-Body's

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Stiffen Up Your G-Body The Easy Way!

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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