UMI Performance 64-72 GM A-Body Tubular Front Upper A-Arms Delrin Bushings

The UMI Performance tubular upper A-arms, part number 4033-R, are built with TIG welded DOM tubing and feature a relocated ball joint plate. This design allows for up to six degrees of caster adjustment without needing excessive shims, which significantly improves steering feedback and makes the car feel more precise on the road. You'll notice a more connected feel to the steering, especially during spirited driving or on the track.

These A-arms come equipped with UMI's own greaseable Delrin bushings, known for their low deflection and durable performance. They also include CrMo cross shafts, polyurethane bump stops, and premium ball joints already installed. The robust tubular design is bent on a programmable tube bender, ensuring consistency and strength. The arms are finished with a durable gloss red powder coat, keeping them looking good on your street car, drag car, or autocrosser. This kit is designed as a direct bolt-in for factory height or lowered vehicles, and it includes recommended alignment specs and detailed installation instructions to help you get them fitted correctly.

This part fits a wide range of classic GM A-Body vehicles, including popular models like the Chevrolet Chevelle, Pontiac GTO, and Oldsmobile Cutlass. The hardware kit, sold separately as part # 4003, includes all the necessary Grade 8 bolts, washers, and nylock nuts to mount your new A-arms securely.