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 chromoly, hard chrome plated spherical ball which rotates in a delrin race. The 4140 chromoly 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 chromoly 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.. This kit includes rear lower control arms and a single adjustable panhard bar. The control arms feature polyurethane bushings on one end and UMI's spherical Roto-Joint on the other, designed for street performance and enthusiast use. The polyurethane bushings absorb road noise and shock, while the Roto-Joint allows for 28 degrees of total movement, enhancing handling and performance compared to factory rubber and aftermarket bushings. The included panhard bar is crucial for centering the rear end after lowering the vehicle and accommodating larger tires. UMI's Roto-Joint technology provides unrestricted movement and prevents suspension bind, improving traction and reducing wheel hop. Made from 4140 chrome moly material and hard chrome plating, it offers durability and wear resistance. The Roto-Joint is adjustable and fully rebuildable for long-lasting performance.. 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.. This kit includes rear lower control arms with polyurethane bushings and Roto-Joints, plus a single adjustable panhard bar. The Roto-Joint allows 28° movement, reducing bind, improving traction, & centering the rear end for lowered vehicles. UMI Performance 82-02 F-Body Lower Control Arms & Panhard Bar Kit- w/ Roto-Joints. Rear control arms with adjustable Roto-Joint & panhard bar for improved handling. High Quality greaseable polyurethane bushings. Shipped fully assembled and ready to install. Brilliant and durable powder coat finish. Constructed of DOM mild steel tubing. Spherical Roto-Joints installed. Kit is fully TIG welded. UMI- Rear End Kit. Uses OEM hardware. Control Arms Kit

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