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Chassis Components› Chassis and Frame Components

Umi Performance

Rear Lower Control Arms

Name: Rear Lower Control Arms
Brand: Umi Performance
SKU: 3621

$379.49 $320.09 Save $59.40

SKU: 3621

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Overview

The UMI Performance 3621 rear control arms are extended length lower control arms designed for GM B-Body vehicles from 1978-1996. They are intended to optimize wheelbase and enhance wheel appearance within the wheel opening.

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The UMI Performance 3621 extended length lower control arms are specifically engineered for 1978-1996 GM B-Body chassis applications. Constructed from 0.120" wall thickness mild steel tubing, these arms feature a boxed design for enhanced durability and rigidity. They incorporate CNC machining for precise tolerances, MIG-welded DOM steel bushing holders, and modern, greaseable polyurethane bushings for smooth operation and longevity. These control arms are designed to provide a +5/8" extended length, which helps to optimize the vehicle's wheelbase and improve the visual placement of the wheels within the wheel openings. UMI Performance recommends pairing these lower arms with their extended length upper arms, such as models 3619, 3620, or 3624, for optimal results. The arms are finished with a durable, long-lasting UMI Red or Gloss Black powder coat. They are designed and manufactured in the USA using North American raw materials and feature precision welds for superior quality and strength. The control arms are a direct bolt-on installation and are not adjustable. This product fits a wide range of GM B-Body vehicles including the 1991-1996 Buick Roadmaster, 1978-1985 Buick LeSabre, 1978-1996 Chevrolet Caprice, 1994-1996 Chevrolet Impala SS, and 1977-1981 Pontiac Bonneville and Catalina models. Hardware is not included and must be purchased separately. For best results, UMI recommends using their corresponding hardware kit (SKU 3601).

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.

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Specifications

Brand	Umi Performance
Part Number	3621
Category	Chassis Components

Videos

Building a Corner-Carving 1996 Caprice | Performance Enhancements | UMI Performance

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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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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.

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