5255 Upper Adjustable, 79-04 MUSTANG

When it comes to fine-tuning your 1979-2004 Mustang, QA1's Adjustable Upper Trailing Arms (rear control arms) are a game-changer. These control arms are built to improve your Fox Body or SN95's performance and durability with ease.

PINION ANGLE ADJUSTMENT FOR LOWERED VEHICLES

If you've lowered your car, adjusting the pinion angle is a must to keep everything running smoothly. Our Rear Upper Trailing Arms make this adjustment simple, thanks to an aluminum hex design that lets you adjust things right on the car. Getting the pinion angle right not only prevents unnecessary wear and tear on your drivetrain but also helps avoid issues like wheel hop. With everything properly aligned, your car will ride better and perform at its best.

REDUCE REAR SUSPENSION BIND

Our trailing arms are designed to cut down on suspension bind, which means your car’s rear suspension will move more freely. The result? A smoother ride and better traction, giving you more consistent performance every time you hit the road.

THOUGHTFUL DESIGN

Experience the benefits of thoughtful design with this easy bolt-in upgrade. Engineered for durability and performance, these components replace the soft OE differential bushings with high-quality polyurethane bushings, enhancing stability and responsiveness.

EASY BOLT-IN INSTALLATION

The bolt-in installation makes this upgrade hassle-free, allowing you to quickly and easily improve your vehicle’s suspension without extensive modifications.

MADE IN THE USA

QA1 suspension is proudly made in Lakeville, Minnesota.

FEATURES & BENEFITS

• High-strength, low-bind construction for reliable performance.
• Aluminum hex design allows for easy on-the-car pinion angle adjustments.
• Reduces friction for smoother suspension travel.
• High-quality polyurethane bushings replace the softer OE ones for improved stability.
• Easy bolt-in installation without complicated modifications needed.
• Proudly made in the USA for top-notch quality you can count on.

FITMENT NOTES

Sold as a pair

Must re-use factory bushing shells

Designed to work with factory rear end housings