# UMI Performance 78-96 GM B-Body Boxed Lower Control Arms- w/ Dual Roto-Joints

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.

-   Constructed of 3” x 1-1/2” x 1/8” rectangular steel tubing
-   Spherical Roto-Joints installed for a bind free performance
-   MIG and TIG welded construction for superior strength
-   CNC machined for accurate tolerances and perfect fit
-   Shipped fully assembled and ready to install
-   Brilliant and durable powder coat finish
-   Reinforced sway bar holes
-   Uses OEM hardware

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

## Details

- **Price:** 573.99 CAD
- **Vendor:** UMI Performance
- **Type:** Control Arms

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 573.99 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/umi-performance-78-96-gm-b-body-boxed-lower-control-arms-w-dual-roto-joints-1)
> Updated: 2026-07-01