# QA1 79-04 Ford Mustang/79-86 Mercury Capri Lower Boxed Trailing Arms

All upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. This keeps the tires planted firmly on the ground for improved traction and a more predictable, better handling car. Trailing arms are powder-coated gloss black for a long lasting finish. Boxed Trailing Arms are constructed from 0.120'' wall cold rolled steel tubing for maximum strength and flex elimination. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Tubular Trailing Arms are constructed from 1-1/4'' diameter, 0.120'' wall steel tubing which offers increased strength over other designs but also has the added advantage of lighter weight. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Heavy-Duty Adjustable Trailing Arms allow easy rear suspension adjustments for optimum handling and traction. Simply loosen the jam nuts and adjust the pinion angle without removing the arms from the vehicle. They replace soft OE differential bushings with polyurethane differential bushings, and they use a spherical ball or rod end assembly with UHMW polyethylene bushings on the chassis end to allow the rear suspension to move more freely and eliminate bushing bind. Adjustable Tubular Lower Trailing Arms are offered in both aluminum and steel. These arms are the ultimate in weight savings and adjustability, and they feature QA1's premium self-sealing and self-lubricating X Series (heat treated chromoly steel) or A Series (aircraft aluminum) rod ends. Kits include (2) lower control arms with rod ends and jam nuts. All parts sold in pairs.

-   Adjustable arms offer easy wheelbase and pinion angle adjustment
-   Direct fit options for many popular GM, Ford & Mopars
-   Easy, bolt-in install
-   Made in the USA

This Part Fits:

Year

Make

Model

Submodel

1979-1981,1994-2004

Ford

Mustang

Base

1981

Ford

Mustang

Cobra

1979-1981

Ford

Mustang

Ghia

1982-1983

Ford

Mustang

GL

1982-1983

Ford

Mustang

GLX

1982-2004

Ford

Mustang

GT

2001

Ford

Mustang

GT Bullitt

1984

Ford

Mustang

GT-350 20th Anniversary

1995

Ford

Mustang

GTS

1982-1984

Ford

Mustang

L

1984-1993

Ford

Mustang

LX

2003-2004

Ford

Mustang

Mach 1

1984-1986

Ford

Mustang

SVO

1993-1999,2001,2003-2004

Ford

Mustang

SVT Cobra

2003

Ford

Mustang

SVT Cobra 10th Anniversary

1993,1995,2000

Ford

Mustang

SVT Cobra R

1983

Ford

Mustang

Turbo GT

1986

Mercury

Capri

5.0

1979-1983

Mercury

Capri

Base

1982-1983

Mercury

Capri

Black Magic

1983

Mercury

Capri

Crimson Cat

1979-1980

Mercury

Capri

Ghia

1981-1986

Mercury

Capri

GS

1982-1983

Mercury

Capri

L

1982-1985

Mercury

Capri

RS

1984

Mercury

Capri

RS Turbo

## Details

- **Price:** 556.73 CAD
- **Vendor:** QA1
- **Type:** Control Arms

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 556.73 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/qa1-79-04-ford-mustang-79-86-mercury-capri-lower-boxed-trailing-arms)
> Updated: 2026-06-27