Upper Rear Axle Control Arm Set, Tubular, Black powder coated w/ Roto-Joint bushings, UMI

Upper Rear Axle Control Arm Set, Tubular, Black powder coated w/ Roto-Joint bushings, UMI

UMIs tubular upper control arms utilize our Roto-Joint technology for a bind free performance and quiet comfortable ride quality. 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. These control arms are a direct bolt on replacement designed to minimize wheel hop, improve corning and help track consistency. Constructed of 1.500 x 0.120 DOM tubing and feature .250 thick CNC machined mounting plates these control arms are some of the beefiest on the market. Control arms are supplied with Roto-Joints fully assembled and are ready to be installed. Roto-Joints are greaseable and low maintenance making an excellent street setup for your cruiser!Features:Constructed of 1.500 x 0.120 DOM mild steel tubingCNC machined for precision tolerances and accuracyMounting plate machined from 0.250 thick mild steelSpherical Roto-Joints installedShipped fully assembled and ready to installUses OEM hardwareBrilliant and durable powder coat finishMore about Roto-Joint Technology.. UMIs Roto-Joint, short for Rotational Joint, allows 28 degrees of total rotation and unrestricted movement throughout the vehicles suspension. The Roto-Joint is designed to work like a spherical rod end while maintaining streetable qualities of a softer bushing. The Roto-Joint is designed to articulate and prevent suspension bind, and since the installed delrin race does not deflect like softer bushings, there is an improvement in traction and a significant reduction in wheel hop. The construction of the Roto-Joint features a 4140 chrome moly, hard chrome plated spherical ball which rotates in a delrin race. The 4140 chrome moly material and hard chrome plating are designed for extensive wear resistance against hard driving and accumulated miles. The spherical ball rotates in the CNC machined delrin bushing, which is contoured for the spherical ball to allow unrestricted movement as the ball rotates. Delrin is the bushing material of choice due to its high resistance against wear, great tensile strength, and ability to maintain its physical properties. The housing of the Roto-Joint features 4140 chrome moly threads, and a CNC machined bushing holder TIG welded together for the utmost in strength and durability. The UMI Roto-Joint is adjustable and 100% rebuildable. This means as the delrin race wears the adjuster ring can be tightened using the optional spanner wrench to apply tension to the ball. If the delrin race would ever wear completely it can be replaced easily.

Installation Note:

Requires no drilling and installs with OEM hardware.

Chevrolet Chevelle / El Camino / Malibu Years:

1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72)

Pontiac GTO / Lemans / Tempest Years:

1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72)

Oldsmobile Cutlass Years:

1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72)

Buick Skylark Years:

1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72)

Chevrolet Monte Carlo Years:

1970 (70), 1971 (71), 1972 (72)