UMI Performance 1057-R Lower Control Arms Ford Mustang - S197

UMI Performance's 1057-R lower control arms are engineered for 2005+ Ford Mustang owners seeking improved suspension performance without sacrificing street comfort. These tubular control arms feature UMI's innovative Roto-Joint technology combined with Energy Suspension greaseable polyurethane bushings for a bind-free, high-performance setup that remains fully streetable.

Roto-Joint Technology:

The heart of this design is UMI's proprietary Roto-Joint, a spherical pivot ball lined with a greaseable delrin race that delivers 28 degrees of total unrestricted movement. This allows the suspension to articulate correctly during aggressive driving, auto-cross, or road racing while eliminating bind and reducing wheel hop. The 4140 chromoly hard chrome-plated spherical ball rotates within a CNC-machined delrin bushing, providing exceptional wear resistance and maintaining precise handling characteristics. The delrin race absorbs shock and road noise, ensuring quiet operation on both street and track.

Hybrid Bushing Configuration:

This control arm set uses polyurethane bushings on the chassis side and Roto-Joints on the rear end side. The softer polyurethane bushings absorb road noise and shock before it enters the passenger compartment, while the Roto-Joints provide bind-free articulation where it's needed most. Both bushing ends and Roto-Joints are greaseable for low-maintenance operation.

Key Features:

• Constructed from 1.250" x 0.120" DOM mild steel tubing for superior strength
• Fully TIG welded construction with durable powder coat finish
• Spherical Roto-Joints pre-installed and factory assembled
• Energy Suspension greaseable polyurethane bushings included
• Uses OEM hardware for direct bolt-on installation
• 100% rebuildable and adjustable Roto-Joints
• Shipped fully assembled and ready to install
• Includes spanner wrench for Roto-Joint adjustment and maintenance

Adjustability and Maintenance:

The included spanner wrench allows you to adjust the Roto-Joint's tension as the delrin race wears over time, maintaining optimal performance. The Roto-Joints can be completely disassembled for cleaning, inspection, and rebuilding, with replacement delrin races available if needed. The 4140 chromoly threads and CNC-machined components ensure long-term durability even under hard driving conditions.

This control arm setup delivers the performance benefits of spherical bearings with the comfort and quiet operation of traditional bushings, making it an ideal upgrade for street performance enthusiasts and weekend track drivers alike.