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Chassis Components› Bushings and Mounts

UMI Performance

Polyurethane Control Arm Bushings

Name: Polyurethane Control Arm Bushings
Brand: UMI Performance
SKU: FBS004

$2,056.39

SKU: FBS004

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The UMI Performance FBS004 is a front end kit designed for 1998-2002 GM F-Body LS1 vehicles. This kit provides a strong foundation for street cars focused on corner carving, combining performance, weight reduction, strength, and comfort. It features a dual tube k-member, lower arms with poly bushings, and non-adjustable upper arms with greaseable poly bushings. The kit includes Viking front coilovers with double adjustable shocks and 550 lb/in springs.

Show original supplier description

The UMI Performance Stage 4 Street Front End Handling Suspension Package is engineered to provide a robust foundation for street cars, focusing on improved cornering performance. This kit integrates lightweight and strong components to reduce front-end weight, enhance suspension durability, and increase handling precision, making it ideal for spirited driving. Constructed from high-strength USA DOM tubing, the K-member and A-arms are precision bent, CNC notched, and jig welded for superior stability and alignment. The package includes polyurethane bushings and premium ball joints for comfort and performance. The Viking front coilovers offer double adjustability for ride height, compression, and rebound, paired with 550 lb/in front springs suitable for daily driving and performance handling. This package is designed as a direct bolt-in replacement that requires no welding and maintains compatibility with the factory steering rack. It is specifically engineered for 1998 to 2002 5.7L Firebird models. Please note that this kit is not compatible with the UMI 2335 control arm mount.

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	FBS004
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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