Description

QA1 Ford Mustang control arms are an easy-to-install solution for increased strength and reduced front-end weight. Saving over 15 lbs. per set, these control arms are an ideal solution for your Mustang.

Offered in two configurations, QA1 Ford Mustang control arms are optimized for your intended use. Choose the street or race-style arms designed for your Mustang.

* Street:
-- QA1 Street control arms are engineered for performance. Great on vehicles primarily used for cruising and the street. They use a factory replacement ball joint for serviceability and polyurethane bushings for a smooth ride and reduced suspension bind.
* Race:
-- QA1 Race control arms are designed for drag racing, pro-touring, and autocross applications. They're equipped with QA1's exclusive X-Series chromoly rod ends and low-friction ball joints, giving you a wide range of wheel alignment settings while reducing friction.

Product Overview

Product Overview QA1's Mustang race control arms are the perfect combination of performance and style, offering lightweight, durable construction and a clean, sleek design that will enhance the look of your Mustang. On-The-Car Adjustability QA1's unique eccentric adjustment sleeve allows for precise tuning of camber and up-to a 1/2 of track width adjustment without removing from the car, a feature not found in other control arms. Forged Ball Joint Housings A unique feature of the QA1 control arm is the forged ball joint housing. This provides exceptional reliability, strength, and durability. The low-friction ball joint ensures smooth operation, and the rebuildable, lightweight, and greaseable design makes maintenance a breeze. Ultra-Low-Friction Composite Bushings QA1's ultra-low-friction composite bushings are stiffer and provide bind-free movement, providing enhanced stability and control. They also allow for freer movement, resulting in a more responsive ride. Additionally, these bushings are much more durable than rubber bushings, making them highly resistant to wear and tear. Finally, composite bushings are greasable.for long life. Lightweight Design QA1 street control arms were designed to be the strongest, best looking control arms on the market. And weighing in at less than 8lbs per arm, this makes them among the lightest of street worthy control arms available. Easy, Bolt-In Installation Our commitment to thoughtful product design is evident in every product we produce, to deliver the highest level of performance at the track, while ensuring trouble-free compatibility. Made in the USA QA1 control arms are proudly made in Lakeville, Minnesota. Fitment Notes Control arms allow +/- 1/8 adjustment from factory length Compatible with factory and QA1 K-members Coilover struts required, not compatible with factory coil springs Fox Body control arms include adapter for SN95 spindles

Features and Benefits

• Correct outdated front end geometry
• Optimized strength to weight ratio
• Low friction bushings
• Designed for use with QA1 patented Ultimate Ball Joints
• Easy bolt-in installation
• Made in the USA

Product Details

Brand:	QA1
Description:	QA1 79-93 Ford Mustang Control Arm Kit Lower Race
Manufacturer Part Number:	52540
Part Number:	qap52540
Prop 65 - Short Label:	WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:	Yes
Title:	QA1 Suspension Control Arm and Ball Joint Assembly 52540
UPC:	806990173836

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	qapDK42-FMM1	QA1 79-86 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104M, 1x qapMUK01, 1x qapHD01-14150, 1x qapRCK52405, 1x qap52540)
	qapDK42-FMM2	QA1 87-89 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapHD01-14150, 1x qapRCK52405, 1x qap52540)
	qapDK42-FMM3	QA1 90-93 Ford Mustang Level 2 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapHD02-14150, 1x qapRCK52405, 1x qap52540)
	qapDK43-FMM1	QA1 79-86 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX104M, 1x qapMUK01, 1x qapT121W, 1x qapHD01-14150, 1x qapRCK52409, 1x qap52540)
	qapDK43-FMM2	QA1 87-89 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD01-14150, 1x qapRCK52409, 1x qap52540)
	qapDK43-FMM3	QA1 90-93 Ford Mustang Level 3 Drag Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52885, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD02-14150, 1x qapRCK52409, 1x qap52540)
	qapHK43-FMM1	QA1 79-86 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX104M, 1x qapMUK01, 1x qapT121W, 1x qapHD01-12300, 1x qapRCK52411, 1x qap52540)
	qapHK43-FMM2	QA1 87-89 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD01-12300, 1x qapRCK52411, 1x qap52540)
	qapHK43-FMM3	QA1 90-93 Ford Mustang Level 3 Handling Kit w/ Shocks (1x qap5221, 1x qap5255, 1x qap52892, 1x qapBAX102, 1x qapMUK02, 1x qapT121W, 1x qapHD02-12300, 1x qapRCK52411, 1x qap52540)

Data: v4.2 - Upd: 2026-10-15 04:55:58

Features

Specifications

Product Attributes - Brand

QA1

Product Attributes - Manufacturer's Part Number

52540

Product Attributes - Part Type

Control Arms

Product Attributes - Product Line

QA1 Ford Control Arms

Product Attributes - UPC

806990173836

Product Attributes - Control Arm Style

Tubular

Product Attributes - Control Arm Material

Steel

Product Attributes - Ball Joint Included

Yes

Product Attributes - Bushings Included

Yes

Product Attributes - Control Arm Color

Black

Product Attributes - Ball Joint Plate Type

Pressed-in

Product Attributes - Adjustable

Yes

Product Attributes - Hardware Included

No

Product Attributes - Bushing Material

Composite

Product Attributes - Quantity

Sold as a pair.

Product Attributes - Notes

Compatible with factory and QA1 K-members. Coilover struts required, not compatible with factory coil springs.

Compatibility