64-70 Mustang QA1 Rear Sway Bar, for QA1 Rear 4 Link

SKU: QA1-52900

QA1 7/8” Solid Rear Sway Bar – 1964–1970 Mustang (Only Fits QA1 4-Link Coilover Systems)

Dial in the handling of your classic Mustang with the QA1 0.875” (7/8 inch diameter) solid rear sway bar, engineered for 1964–1970 Ford Mustangs equipped with the QA1 rear coilover conversion 4-link systems. Designed to work in harmony with QA1 front sway bars and suspension components, this rear sway bar improves cornering balance, increases rear-end stability, and helps your Mustang put power to the pavement with confidence.

As a direct bolt-on upgrade to the QA1 4-link kit, this rear sway bar unlocks the full potential of your rear suspension and delivers a more controlled, performance-driven driving experience.

Sold as KIT

Was: $378.42

Sale: $348.95

Save: 8%

Save: $29.47

Special Notes
FREQUENTLY ASKED QUESTIONS (FAQs)
Details
Shipping
Reviews

Special Notes

Improved Cornering Balance & Rear-End Control

Adding a rear sway bar is one of the most effective ways to modernize the handling of a classic Mustang. QA1’s solid 7/8” rear sway bar increases roll stiffness at the rear axle, helping to reduce understeer, keep the chassis flatter through corners, and maintain more consistent tire contact. The result is sharper turn-in, improved traction, and a more predictable feel during spirited driving, acceleration, and corner exit.

Designed to Work with QA1 Performance Systems

This rear sway bar is purpose-built to complement QA1 front sway bars, tubular suspension components, and coilover systems. When paired together, these components create a balanced suspension setup that enhances stability without making the car feel harsh or unpredictable—ideal for street performance, autocross, or weekend cruising.

Simple Bolt-On Installation

Installation is quick and straightforward. The sway bar mounts directly to the QA1 4-link crossmember with no cutting, welding, or fabrication required. Each kit includes durable polyurethane bushings and heavy-duty mounting hardware, ensuring long service life and consistent performance.

Features & Benefits

Direct-fit rear sway bar for 1964–1970 Ford Mustangs with QA1 rear coilover conversion 4-link
Solid 0.875” (7/8”) construction for strength and reliable performance
Reduces body roll and improves overall handling balance
Enhances rear traction during acceleration and cornering
Designed to pair perfectly with QA1 front sway bars and suspension upgrades
Includes polyurethane bushings and all required mounting hardware
Durable black powder-coated finish for corrosion resistance and longevity

Fitment Notes

Fits 1964–1970 Ford Mustangs
Compatible ONLY with QA1 rear coilover conversion 4-link kits
Not compatible with factory leaf spring setups or other aftermarket suspension systems
Recommended pairing with QA1 front sway bars for optimal handling balance

Specifications

Vehicle Position: Rear

FREQUENTLY ASKED QUESTIONS (FAQs)

What is the diameter of the QA1 rear sway bar for 1964–1970 Mustangs?

The QA1 52900 rear sway bar features a 0.875-inch (7/8”) diameter, providing a significant increase in roll stiffness compared to factory rear sway bars. This added strength helps control body movement and improves overall handling performance on 1964–1970 Ford Mustangs.

How does a rear sway bar improve handling on a classic Mustang?

A rear sway bar helps limit body roll during cornering while improving rear tire traction. When used alongside a front sway bar, it balances the suspension system, allowing the Mustang to corner flatter and feel more stable and predictable—especially during spirited driving.

Is the QA1 52900 rear sway bar a direct bolt-on upgrade?

Yes. The QA1 52900 rear sway bar is designed to bolt directly to the QA1 rear coilover conversion crossmember for 1964–1970 Mustangs. No fabrication is required, and all necessary mounting hardware and polyurethane bushings are included. It does NOT work with the stock rear suspension or other aftermarket rear suspensions.

Can this rear sway bar be used with factory front suspension components?

Yes, the QA1 rear sway bar can be used with the factory front suspension. However, for the best handling balance and performance, QA1 recommends pairing it with a QA1 front sway bar, coilover shocks, and tubular control arms as part of a complete suspension system.

Will installing a rear sway bar negatively affect ride comfort?

No. QA1’s rear sway bar is designed to enhance cornering performance without making the ride harsh. Under normal street driving conditions, ride quality remains comfortable while providing noticeably improved control during turns.