This QA1 rear coil-over system converts classic Mopar A-Body cars from leaf-spring rear suspension to a triangulated four-link coil-over design. The setup provides a more planted feel, room for larger wheels and tires, wheelbase correction, and clearance for a 3 inch bumper-exit exhaust. Powder-coated tubular components, including the crossmember and upper and lower trailing arms, come with all required hardware. The system works with popular rear axles including the Mopar 8-3/4 inch, Ford 9 inch, and Dana 60. Single-adjustable coil-over shocks allow ride and handling to be fine-tuned and the ride height to be adjusted.
Specifications:
- Type: triangulated four-link rear coil-over suspension system
- Shock valving: Single-Adjustable
- Rear axle compatibility: Mopar 8-3/4 inch (also offered for Ford 9 inch and Dana 60 under other part numbers)
- Exhaust clearance: fits 3 inch bumper-exit exhaust
- Finish: powder coated
- Includes: tubular crossmember, upper and lower trailing arms, coil-over shocks, springs, and hardware
- Part number: R150-175
Vehicle Applications:
- 1963 Dodge Dart
- 1963 Plymouth Valiant
- 1964 Dodge Dart
- 1964 Plymouth Barracuda
- 1964 Plymouth Valiant
- 1965 Dodge Dart
- 1965 Plymouth Barracuda
- 1965 Plymouth Valiant
- 1966 Dodge Dart
- 1966 Plymouth Barracuda
- 1966 Plymouth Valiant
- 1967 Dodge Dart
- 1967 Plymouth Barracuda
- 1967 Plymouth Valiant
- 1968 Dodge Dart
- 1968 Plymouth Barracuda
- 1968 Plymouth Valiant
- 1969 Dodge Dart
- 1969 Plymouth Barracuda
- 1969 Plymouth Valiant
- 1970 Dodge Dart
- 1970 Plymouth Duster
- 1970 Plymouth Valiant
- 1971 Dodge Dart
- 1971 Plymouth Duster
- 1971 Plymouth Scamp
- 1971 Plymouth Valiant
- 1972 Dodge Dart
- 1972 Plymouth Duster
- 1972 Plymouth Scamp
- 1972 Plymouth Valiant
- 1973 Dodge Dart
- 1973 Plymouth Duster
- 1973 Plymouth Scamp
- 1973 Plymouth Valiant
- 1974 Dodge Dart
- 1974 Plymouth Duster
- 1974 Plymouth Scamp
- 1974 Plymouth Valiant
- 1975 Dodge Dart
- 1975 Plymouth Duster
- 1975 Plymouth Scamp
- 1975 Plymouth Valiant
- 1976 Dodge Dart
- 1976 Plymouth Duster
- 1976 Plymouth Scamp
- 1976 Plymouth Valiant
FAQ
Which cars does the QA1 R150-175 rear system fit?
It fits classic Mopar A-Body cars, 1963-1976 per the fitment table.
What does this system replace?
It replaces the factory leaf-spring rear suspension with a triangulated four-link coil-over design.
Which rear axles does it work with?
QA1 Mopar rear systems work with popular rear axles including the Mopar 8-3/4 inch, Ford 9 inch, and Dana 60; this part number is configured for the 8-3/4 inch axle.
Does it clear a bumper-exit exhaust?
Yes. The design allows a 3 inch bumper-exit exhaust.

