UMI Performance 3040-B Lower Control Arms with Roto-Joint Technology

The UMI Performance 3040-B lower control arms deliver professional-grade suspension performance through advanced Roto-Joint technology. Designed for muscle cars and performance vehicles, these tubular control arms eliminate bushing bind while maintaining excellent street manners and precise handling characteristics.

Roto-Joint Technology:

The heart of this design is UMI's proprietary Roto-Joint system, featuring a pivot ball lined with a greaseable Delrin race. This engineered solution provides 28 degrees of total unrestricted movement, allowing the suspension to articulate correctly without the limitations of factory rubber or aftermarket polyurethane bushings. The Delrin race absorbs shock and road noise, delivering quiet operation on the street while maintaining the precision needed for autocross and road racing.

Construction and Features:

• Constructed from 1.500-inch diameter x 0.120-inch wall DOM mild steel tubing
• Fully TIG welded for maximum strength and durability
• Roto-Joints installed on both ends for maximum performance and suspension travel
• Reinforced sway bar mounting holes with 0.120-inch wall steel sleeves, TIG welded and finish-sanded
• Compatible with OEM hardware for straightforward installation
• Greaseable Roto-Joints for low maintenance and long service life
• Durable powder coat finish for corrosion resistance
• Ships fully assembled and ready to install

These control arms offer the ideal balance between high-performance handling and daily drivability. Whether you're carving corners on track day or cruising on the street, the bind-free operation and precision geometry deliver improved control and confidence. The design accommodates stock or aftermarket sway bars, making them versatile for various suspension setups.