UMI Performance 3036-B Rear Upper Tubular Control Arms with Roto-Joint Technology

The UMI Performance 3036-B rear upper tubular control arms are a direct bolt-on replacement designed to minimize wheel hop, improve cornering, and enhance track consistency. Built from 1.500" x 0.120" DOM mild steel tubing with 0.250" thick CNC machined mounting plates, these are among the most robust upper control arms available for the GM G-Body platform.

At the heart of these arms is UMI's proprietary Roto-Joint technology — a pivot ball lined with a greaseable Delrin race engineered to provide 28 degrees of total unrestricted movement for a bind-free, low-friction operation. Unlike factory rubber or aftermarket polyurethane bushings, the Roto-Joint allows the suspension to articulate freely and correctly, delivering precision handling whether on the street or track. The Delrin race lining absorbs shock and road noise for a smooth, quiet ride on any surface.

Key Features:

• Constructed of 1.500" x 0.120" DOM mild steel tubing for maximum strength
• Mounting plate CNC machined from 0.250" thick mild steel for precision tolerances
• Proprietary Roto-Joint design offers 28 degrees of unrestricted suspension movement
• Greaseable Delrin race lined spherical ball absorbs shock and reduces road noise
• Spherical ball and housing constructed from 4140 chrome moly steel
• Roto-Joints are adjustable and rebuildable for long-term serviceability
• Durable powder coat finish in black for lasting corrosion resistance
• Uses OEM hardware for a straightforward installation
• Shipped fully assembled and ready to install
• Made in the USA using North American sourced steel

The UMI 3036-B is an ideal upgrade for street cruisers, autocross builds, and road race applications alike. The installed Roto-Joints keep the rear end moving freely under hard cornering while remaining 100% streetable — offering a quiet, comfortable daily driving experience without compromise.