UMI Performance 4041-R Rear Lower Control Arms with Roto-Joint Technology

UMI Performance 4041-R Rear Lower Control Arms deliver bind-free performance and superior handling for street and performance applications. These boxed control arms combine UMI's innovative Roto-Joint technology with greaseable polyurethane bushings to eliminate control arm flex and bushing deflection while maintaining a comfortable, quiet ride.

Key Features:

• Constructed from 3" x 1-1/2" x 0.120" wall thickness rectangular steel tubing for maximum strength
• UMI Roto-Joint spherical bearings with delrin-lined race providing 28 degrees of unrestricted movement
• Energy Suspension greaseable polyurethane bushings on chassis end to absorb road noise and shock
• CNC machined drawn-over-mandrel bushing holders for precise tolerances and perfect fitment
• MIG and TIG welded construction with welded end caps to prevent road debris entry
• Reinforced sway bar mounting holes with TIG-welded 0.120" wall thickness steel sleeves
• Durable powder coat finish for long-lasting corrosion resistance
• Uses OEM hardware for straightforward installation
• Shipped fully assembled and ready to install

The hybrid bushing design positions the softer polyurethane bushing at the chassis mounting point to isolate road noise from the passenger compartment, while the Roto-Joint mounts to the rear axle side for precise suspension articulation. This configuration eliminates bind during suspension travel while reducing wheel hop and improving traction. The delrin-lined Roto-Joint provides low-friction operation suitable for high-performance driving, autocross, and road racing while remaining 100% street-friendly.