QA1 Adjustable Upper Trailing Arms (5255) - 1979-2004 Mustang

Fine-tune your Mustang’s rear suspension with the QA1 Adjustable Upper Trailing Arms, designed for 1979-2004 Fox Body and SN95 applications. These performance upgrades allow precise pinion angle adjustment while reducing suspension bind, improving traction, and enhancing overall drivability.

Whether your Mustang is lowered or built for performance, these trailing arms provide the adjustability and durability needed to keep your drivetrain properly aligned. The aluminum hex adjuster allows for easy on-car tuning, helping eliminate wheel hop and unnecessary drivetrain wear while maximizing performance.

Features

• Adjustable upper trailing arms for 1979-2004 Mustang
• Allows precise pinion angle adjustment for optimal drivetrain alignment
• Aluminum hex design enables easy on-car adjustments
• Reduces suspension bind for smoother rear suspension movement
• Improves traction and minimizes wheel hop
• High-strength construction for durability and performance use
• Polyurethane bushings replace soft factory bushings for improved stability
• Low-friction design for consistent suspension travel
• Bolt-in installation for easy upgrade
• Sold as a pair

Additional Notes

• Must reuse factory bushing shells during installation
• Designed for use with factory rear end housings
• Ideal for lowered vehicles requiring pinion angle correction

Fitment

- 1979 Ford Mustang
- 1980 Ford Mustang
- 1981 Ford Mustang
- 1982 Ford Mustang
- 1983 Ford Mustang
- 1984 Ford Mustang
- 1985 Ford Mustang
- 1986 Ford Mustang
- 1987 Ford Mustang
- 1988 Ford Mustang
- 1989 Ford Mustang
- 1990 Ford Mustang
- 1991 Ford Mustang
- 1992 Ford Mustang
- 1993 Ford Mustang
- 1994 Ford Mustang
- 1995 Ford Mustang
- 1996 Ford Mustang
- 1997 Ford Mustang
- 1998 Ford Mustang
- 1999 Ford Mustang
- 2000 Ford Mustang
- 2001 Ford Mustang
- 2002 Ford Mustang
- 2003 Ford Mustang
- 2004 Ford Mustang

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