Upper Control Arms

UMI’s Roto-Joint adjustable rear upper control arms are a reliable upgrade for your street or pro-touring car. These upper control arms are suitable for various driving conditions, whether it be on the street, strip, or carving corners. The premium spherical joint minimizes suspension deflection for improved handling, easier pinion angle tuning, and reduced wheel hop. The on-car adjustable design allows for easy adjustments while the control arms remain securely bolted to the vehicle. The heavy-duty construction of these control arms, featuring ¼” thick CNC laser cut mounting pads and a combination of TIG and MIG welding, ensures strength and durability. The UMI designed Roto-Joints and chromoly adjuster provide ultimate performance. These bolt-in replacements are designed to fit all rear end housings and can be installed in 1-2 hours. Upgrade your vehicle with UMI’s ultimate control arms and experience improved launch and handling capabilities.

Additional Information

UMI’s Roto-Joint adjustable rear upper control arms improve handling, reduce wheel hop, and simplify pinion angle tuning. Built with CNC-cut pads, TIG/MIG welds, and chromoly adjusters, they install in 1–2 hours for street or track use.

• Chromoly threaded adapters for improved thread strength
• CNC laser cut ¼” upper mounting pads
• Durable and long lasting powder coat finish
• Made in Philipsburg, PA – USA
• On car adjustment using UMI designed & manufactured chromoly adjuster
• UMI designed Roto-Joints

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Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information