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Auto Barn
Est. 1957
UMI Performance

UMI Performance 78-88 GM G-Body 3/4in Solid Rear Sway Bar Auto-x/Road Race

$543.99

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Fits 1978-1988 GM G-Body. UMI Performance 3/4in solid rear sway bar for autocross and road racing, designed to improve handling and reduce rear wheel lift.

Key Features

  • Fits 1978-1988 GM G-Body vehicles.
  • Features a lightweight 3/4-inch solid rear sway bar made from 4140 CrMo steel, CNC bent for precise geometry.
  • Includes a 1-inch billet steel hex adjuster for extreme strength, allowing for three adjustable rates: 346 lb/in, 262 lb/in, and 205 lb/in.
  • Comes with premium, greaseable polyurethane bushings and heavy-duty race-style CrMo spherical rod ends with Teflon races.
  • Differential housing mounts are CNC machined with grip teeth and reinforcement gussets, designed to fit axle tubes from 2.75" to 3.25" in diameter.
  • Double shear chassis mounts attach with four 3/8" fasteners, requiring drilling through the crossmember (template and instructions included).

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This kit includes a UMI Performance 3/4-inch solid rear sway bar, designed specifically for the 1978-1988 GM G-Body chassis. It's built for autocross and road racing, aiming to enhance your car's handling during spirited driving. The sway bar itself is constructed from lightweight 4140 CrMo steel, CNC bent for precise geometry. It features a 1-inch billet steel hex adjuster for strength and allows for three distinct rates: 346 lb/in, 262 lb/in, and 205 lb/in, so you can tune the bar's stiffness to your driving style and track conditions. The kit also comes with premium, greaseable polyurethane bushings and heavy-duty race-style CrMo spherical rod ends with Teflon races for smooth operation and durability.

UMI designed this sway bar to address common issues in G-Body performance builds, like the inside rear tire lifting during hard cornering, which can happen with stiffer setups. This bar helps prevent that lift while still providing essential roll resistance and improving the car's rotation. The chassis and differential housing mounts are engineered to reduce binding, a common problem with factory-style bars. The double shear chassis mounts use four 3/8-inch fasteners, and while drilling through the crossmember is required, a template and instructions are included to guide you. The differential housing mounts are CNC machined with grip teeth and reinforcement gussets, designed to fit axle tubes from 2.75 inches up to 3.25 inches in diameter, clearing many common aftermarket rear ends like Moser, Strange, and Currie. You can choose to bolt it on or weld the mounts for extra security.

This sway bar is a popular choice for drivers looking to fine-tune their G-Body's performance for competitive events. The adjustable mount points on the chassis allow you to select the longest hole for street driving and high-speed courses, the middle hole for medium courses, and the shortest hole for maximum rotation and agility. The kit includes high-strength 4140 CrMo zinc-plated u-bolts for secure attachment to the axle. With its durable powder coat finish and greaseable bushings, this sway bar is built to last through many seasons of racing and performance driving.

Specifications

Brand
UMI Performance
Manufacturer Part #
3052-300-R
UPC
3052-300-R

Frequently Asked Questions

UMI Performance 78-88 GM G-Body 3/4in Solid Rear Sway Bar Auto-x/Road Race

$543.99