Eliminate wheel hop, increase traction and improve handling performance with an easy bolt on installation. UMI Performance’s adjustable upper controls feature on car adjustability and are supplied with spherical Roto-Joints. The Roto-Joint design is a pivot ball lined with a greaseable delrin race designed to offer 28 degrees of total unrestricted movement, more than adequate for a bind free, low friction operation. The Roto-Joint design improves performance over the factory rubber and aftermarket polyurethane bushings by allowing the suspension to articulate correctly, and provide precision handling. The installed UMI Roto-Joint allows rear end free movement when high handling, auto cross or road race is a concern while still being a 100% streetable setup. The installed delrin race, which lines the spherical ball, absorbs shock and road noise for a quiet and smooth operation on any street or track driven vehicle.
For ease of adjustment UMI has designed our upper control arms with on car adjustability. Pinion angle adjustments can easily be made in the garage or at the track and making adjustments is as simple as loosening two jam nuts. Using UMI’s chrome moly on car adjuster, simply turn the adjuster with the control arms attached to the vehicle to quickly lengthen or shorten the control arm. As the control arms are shortened or lengthen the rotate the rear end changing the pinion angle. Pinion angle adjustments are crucial when wanting to lower your track 60 foot times, increase traction and reduce unwanted wheel hop.
UMI’s adjustable upper control arms use greaseable Roto-Joints for bind-free suspension movement, sharper handling, and quiet street manners. On-car adjustability makes pinion angle changes easy, improving traction and reducing wheel hop.
UMI Performance 91-96 Impala SS Adjustable Extended Length Upper Control Arms - Roto-Joints
UMI adjustable uppers with Roto-Joints cut wheel hop & boost traction
Mounting plate CNC machined from 0.250” thick mild steel
On car adjustable using a chromoly, heat treated adjuster
Shipped fully assembled and ready to install
Brilliant and durable powder coat finish
4140 chromoly threaded tube adaptors
UMI- Adjustable Rear Control Arms
Spherical Roto-Joints installed
Upper Control Arms
Uses OEM hardware
