UMI Performance 3038-R GM G-Body UMI Rear Lower Control Arms Poly / Roto Joint Combo Pair - Red

1978-1988 G-Body Lower Control Arms- Poly/Roto-Joint Combination
Red Powdercoat

Made in the USA!

• Applications:
• 1978 - 1988 Chevrolet Monte Carlo, Malibu, El Camino
• 1978 - 1988 Buick Regal, Grand National
• 1978 - 1988 Pontiac Grand Prix, LeMans
• 1978 - 1988 Oldsmobile Cutlass

UMI's tubular lower control arms utilize their 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-Jointallows 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. This control arm set features polyurethane bushings on one end and UMI"s swivel Roto-Joint on the other end. This set-up is designed for street performance and street enthusiast. The polyurethane bushing end is designed to be bolted to the vehicle chassis side while the Roto-Joint attaches to the rear end side. Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger compartment of the vehicle. Both control arms feature the correct provisions for adding a stock or aftermarket sway bar. Sway bar holes are reinforced with a 0.120" wall thickness steel sleeve that is TIG welded and sanded into place. All bushing ends and 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 tubing
• Swivel Roto-Joints installed
• Energy Suspension greaseable polyurethane bushings
• Fully TIG welded
• einforced sway bar holes
• Shipped fully assembled and ready to install
• Uses OEM hardware
• Brilliant and durable powder coat finish

More about Roto-Joint Technology

UMI's 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.

Spanner Wrench
This spanner wrench is used for adjusting and disassembling Roto-Joints used in all UMI Performance products. Over time if the delrin race inside the Roto-Joint would wear the spanner wrench is used to tighten the adjusting ring applying more pressure to the delrin inside. The spanner wrench is also used to disassemble the Roto-Joint for cleaning, inspection and rebuilding.

• Features:
• 100% Rebuildable Design
• Reduces Suspension Bind
• elrin race absorbs shock
• Greaseable unit increases bushing life
• Tig welded construction
• Chrome moly spherical ball
• 8 Degrees of total unrestriced movement
• Built exclusively by UMI Performance
• Made in the USA!

Warranty: UMI Performance offers a 2 Year replacement Warranty from the original purchase date to the original purchaser of the parts.

Also available in Black Powdercoat:
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UMI Performance proudly designs and manufactures its entire line of products within its facility located in the small town of Philipsburg, Pennsylvania. The facility features CNC machining, both milling and turning CNC's, band sawing, press brake operation, MIG and TIG welding, sand blasting, plasma cutting and powder coating.