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Suspension and Components› Sway Bars and Components

UMI Performance

1.125-inch Rear Solid Sway Bar

Name: 1.125-inch Rear Solid Sway Bar
Brand: UMI Performance
SKU: 3634

$254.99

SKU: 3634

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The UMI Performance 3634 is a rear sway bar designed to decrease body roll and enhance handling performance. This solid sway bar features a 1.125-inch diameter and is constructed from CrMo solid steel. It can be mounted to UMI arms, other brands with sway bar mounting holes, or factory arms with the optional 3636 bracket kit.

Show original supplier description

The UMI Performance 3634 rear sway bar is a direct bolt-on upgrade engineered to reduce body roll and significantly improve your vehicle's handling characteristics. Constructed from 1.125-inch diameter CrMo solid steel, this sway bar offers robust performance and durability. For installation on factory control arms that lack provisions for a sway bar, the optional PN 3636 bracket kit is required. This sway bar is proudly manufactured in the USA, utilizing North American sourced steel and finished with a durable powder coat. The hardware necessary for installation is included, ensuring a convenient upgrade process. UMI offers this sway bar in their signature red or gloss black finishes. Fitment Note: This rear sway bar is specifically designed for the 1978-1996 GM B-Body platform. However, it does not fit wagon models. It is compatible with various models including the Buick Roadmaster, LeSabre, Chevrolet Caprice, Impala SS, and Pontiac Bonneville and Catalina within the specified year range. Ensure your vehicle is not a wagon model before purchasing.

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	3634
Category	Suspension and Components

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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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