UMI Performance 3624-B Upper Control Arms with Spherical Roto-Joints

UMI Performance's 3624-B adjustable upper control arms are engineered to eliminate wheel hop, increase traction, and improve handling performance with a simple bolt-on installation. These control arms feature on-car adjustability for quick pinion angle changes at the track or in your garage.

Key Features:

• Spherical Roto-Joints with greaseable delrin race providing 28 degrees of unrestricted movement
• On-car adjustable design using chromoly heat-treated adjuster for quick length changes
• 4140 chromoly threaded tube adaptors for maximum strength
• CNC-machined mounting plates from 0.250-inch thick mild steel
• Durable powder coat finish for long-lasting appearance
• Uses OEM hardware for straightforward installation
• Ships fully assembled and ready to install

Performance Benefits:

The innovative Roto-Joint design significantly outperforms factory rubber and aftermarket polyurethane bushings by allowing proper suspension articulation and delivering precision handling. The spherical ball joint lined with a delrin race absorbs shock and road noise, making these control arms ideal for both street-driven vehicles and track applications including autocross and road racing. Pinion angle adjustments are made simple—just loosen two jam nuts and turn the adjuster to lengthen or shorten the control arm, rotating the rear end to optimize traction and reduce 60-foot times.

These upper control arms provide bind-free, low-friction operation while maintaining 100% street drivability, making them the perfect upgrade for muscle cars and performance vehicles demanding both handling precision and daily driver comfort.