UMI Performance 1048-B Upper Control Arm for Ford Mustang - S197

The UMI Performance 1048-B is a heavy-duty upper rear control arm designed to replace the factory stamped unit on S197 Mustang chassis. This direct bolt-on replacement significantly reduces wheel hop and increases traction by eliminating the flex found in stock components under hard acceleration and braking.

Key Features:

• Precision TIG welded construction for maximum strength and durability
• Heat treated 4140 chromoly adjuster with chromoly threaded adaptor for thread durability
• Greaseable Energy Suspension polyurethane bushings for improved performance and longevity
• On-car adjustment capability—no removal required for pinion angle tuning
• Reuses factory mounting hardware for straightforward installation
• Durable powder coat finish available in red or black
• Includes spacer kit (Part #1058) to eliminate factory 16mm oversized hole issue

Why Upgrade?

The S197 Mustang's 3-link rear suspension system relies on control arms to manage axle movement. Under hard launches and aggressive driving, the factory stamped steel arms flex and the rubber bushings deflect, leading to poor traction and inconsistent handling. This UMI control arm uses stronger materials and polyurethane bushings to maintain precise suspension geometry, delivering better control and improved launch traction.

About the Spacer Kit:

Ford's factory rear upper control arm mount uses a 14mm bolt but features an oversized 16mm hole in the chassis mount, creating unwanted play. The included stepped spacer kit reduces this hole to the correct 14mm diameter, eliminating clunking noises and bolt shift during acceleration and braking. This kit is designed for OEM mounts and aftermarket mounts with 16mm holes.

Adjustment Capability:

Quick pinion angle adjustments can be made on the vehicle with a simple wrench turn, making it easy to dial in suspension geometry for optimal performance or correct geometry after lowering your Mustang.