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Suspension and Components› Rear Suspension Components
UMI PERFORMANCE
UMI Performance 78-88 GM G-Body Adjustable Upper Control Arms- Poly Bushings
SKU: U01C 3025-B
Easy — 1–2 hours
Overview
Crafted with CNC-machined steel mounting plates and 4140 chrome moly threaded tube adapters, these control arms are built for durability. The heat-treated adjuster ensures strength, while the greaseable polyurethane bushings provide smooth operation and longevity. This set is a direct bolt-on application.
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Part #: 3025-B
UMI Performance adjustable upper control arms allow you to adjust your vehicles pinion angle for optimum performance, precise handling and improved traction. Adjustable upper control arms are constructed of CNC machined 0.250" steel mounting plates, 4140 chromoly threaded tube adapters and a high strength, 4140 chromoly, heat treated 1.000" solid adjuster. UMI Performance's unique on-car adjuster allows for easy adjustments with out removing or unbolting the control arm from the vehicle. Adjusting your vehicles pinion angle is must when wanting to lower your track 60-foot times, increase traction and reduce unwanted wheel hop. These control arms also feature grease-able Energy Suspension fluted polyurethane bushings and durable gloss powder coat.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Rear wheel hop during acceleration
- Vibration in rear under hard launch
- Poor traction on corner exit
- Driveline clunk when shifting gears
- Inconsistent pinion angle affecting handling
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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 | U01C 3025-B |
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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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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.
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