UMI's boxed lower control arms feature Roto-Joint technology for a smooth and bind-free performance, providing a comfortable ride. The control arms are constructed from 0.120” wall thickness rectangular tubing, with CNC machined bushing holders and MIG welded end caps to keep out debris. They are designed to accommodate both stock and aftermarket rear sway bars, with reinforced sway bar holes for added strength. The Roto-Joints eliminate arm flex and bushing deflection, improving traction and reducing wheel hop.The Roto-Joints offer 28 degrees of unrestricted movement, allowing for precise handling and articulation. The delrin-lined Roto-Joints absorb shock and road noise, making them suitable for both street and track use. The control arms are shipped fully assembled and ready to install, with a durable powder coat finish for longevity.UMI's Roto-Joint technology features a 4140 chrome moly spherical ball rotating in a delrin race, providing wear resistance and durability. The Roto-Joints are adjustable and rebuildable, ensuring long-term performance.The optional spanner wrench allows for easy adjustment and disassembly of the Roto-Joints for maintenance.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
1978-1981	Buick	LeSabre	Base
1985	Buick	LeSabre	Collector's Edition
1978,1982-1985	Buick	LeSabre	Custom
1985	Buick	LeSabre	Estate Wagon
1979-1985	Buick	LeSabre	Limited
1982	Buick	LeSabre	Limited Edition F/E
1978-1981	Buick	LeSabre	Sport
1992-1995	Buick	Roadmaster	Base
1996	Buick	Roadmaster	Collector's Edition
1991-1995	Buick	Roadmaster	Estate Wagon
1996	Buick	Roadmaster	Estate Wagon Collector's Edition
1992-1995	Buick	Roadmaster	Limited
1996	Buick	Roadmaster	Limited Collector's Edition
1986-1992	Chevrolet	Caprice	Base
1978-1996	Chevrolet	Caprice	Classic
1986-1990	Chevrolet	Caprice	Classic Brougham
1978,1981-1982	Chevrolet	Caprice	Classic Estate
1978-1981	Chevrolet	Caprice	Classic Landau
1993-1994	Chevrolet	Caprice	Classic LS
1987-1990	Chevrolet	Caprice	Classic LS Brougham
1991-1993	Chevrolet	Caprice	Classic LTZ
1979-1980	Chevrolet	Caprice	Classic Sport
1994-1996	Chevrolet	Impala	SS
1977-1981	Pontiac	Bonneville	Base
1977-1981	Pontiac	Bonneville	Brougham
1978-1981	Pontiac	Bonneville	Safari
1977-1981	Pontiac	Catalina	Base
1977-1981	Pontiac	Catalina	Safari