The UMI Performance boxed rear lower control arms replace the factory stamped lower trailing arms on 1978 to 1996 GM B-body vehicles with a stronger boxed steel design. Polyurethane bushings tighten rear axle location and reduce flex under acceleration and braking compared to worn factory rubber, which improves traction and handling. The arms are finished in black powder coat for corrosion resistance and are sold as a pair. These control arms are made in the USA.
Specifications:
- Boxed rear lower control arms
- Polyurethane bushings
- Steel construction
- Black powder coat finish
- Sold as a pair
- Made in the USA
- Part number: 3621-B
Vehicle Applications:
- 1978 Buick LeSabre
- 1979 Buick LeSabre
- 1980 Buick LeSabre
- 1981 Buick LeSabre
- 1982 Buick LeSabre
- 1983 Buick LeSabre
- 1984 Buick LeSabre
- 1985 Buick LeSabre
- 1986 Buick LeSabre
- 1987 Buick LeSabre
- 1988 Buick LeSabre
- 1991 Buick Roadmaster
- 1992 Buick Roadmaster
- 1993 Buick Roadmaster
- 1994 Buick Roadmaster
- 1995 Buick Roadmaster
- 1996 Buick Roadmaster
- 1978 Chevrolet Caprice
- 1979 Chevrolet Caprice
- 1980 Chevrolet Caprice
- 1981 Chevrolet Caprice
- 1982 Chevrolet Caprice
- 1983 Chevrolet Caprice
- 1984 Chevrolet Caprice
- 1985 Chevrolet Caprice
- 1986 Chevrolet Caprice
- 1987 Chevrolet Caprice
- 1988 Chevrolet Caprice
- 1989 Chevrolet Caprice
- 1990 Chevrolet Caprice
- 1991 Chevrolet Caprice
- 1992 Chevrolet Caprice
- 1993 Chevrolet Caprice
- 1994 Chevrolet Caprice
- 1995 Chevrolet Caprice
- 1996 Chevrolet Caprice
- 1994 Chevrolet Impala
- 1995 Chevrolet Impala
- 1996 Chevrolet Impala
- 1978 Pontiac Bonneville
- 1979 Pontiac Bonneville
- 1980 Pontiac Bonneville
- 1981 Pontiac Bonneville
- 1978 Pontiac Catalina
- 1979 Pontiac Catalina
- 1980 Pontiac Catalina
- 1981 Pontiac Catalina
FAQ
What do the UMI Performance boxed rear lower control arms fit?
They fit 1978 through 1996 GM B-body vehicles, including the Chevrolet Caprice and Impala, Buick LeSabre and Roadmaster, and Pontiac Bonneville and Catalina.
Why are the control arms boxed?
The boxed steel design adds strength and resists flex compared to the factory stamped lower arms, which improves rear axle control.
Are the control arms sold individually or as a pair?
They are sold as a pair.
What bushings do the control arms use?
They use polyurethane bushings, which reduce deflection and improve traction compared to worn factory rubber.
Where are these control arms made?
They are made in the USA.
