UMI Performance 91-96 Impala SS Adjustable Extended Length Upper Control Arms - Roto-Joints

If you're working on a 1991-1996 Chevrolet Caprice or Impala SS, these adjustable upper control arms from UMI Performance are a solid option for improving rear suspension performance. They're designed to help eliminate wheel hop, increase traction, and sharpen up your car's handling. The key here is the Roto-Joints, which are essentially pivot balls lined with a greaseable Delrin race. This setup allows for a generous 28 degrees of movement, meaning your suspension can articulate freely without binding, which is a big step up from the factory rubber bushings. This bind-free operation translates to more precise handling, especially during spirited driving, auto-cross, or track events, while still being perfectly streetable. The Delrin race also does a good job of absorbing road noise and shock, keeping things quiet and comfortable on the street.

What really makes these arms stand out is the on-car adjustability. UMI built in a heat-treated, chromoly adjuster that lets you change the length of the control arm without removing it from the vehicle. This is crucial for fine-tuning your pinion angle, which directly impacts how your rear end puts power down. Getting the pinion angle just right can significantly reduce wheel hop, boost your 60-foot times at the track, and generally improve overall traction. Adjustments are straightforward, just loosen a couple of jam nuts and turn the adjuster to lengthen or shorten the arm.

These control arms are shipped fully assembled and ready to bolt on, using your OEM hardware. They're finished with a durable powder coat for a clean look and added protection.