This QA1 rear suspension system converts 70-74 Mopar E-Body cars such as the Challenger and Barracuda from leaf springs to a triangulated 4-link coil-over design. It delivers a more planted feel, makes room for larger wheels and tires, corrects wheelbase and allows a 3in bumper exit exhaust.
Specifications:
- Triangulated 4-link coil-over rear suspension
- Powder-coated tubular cross member, upper and lower trailing arms
- Works with Chrysler 8-3/4in and Ford 9in rear axle housings
- Choice of single-adjustable, double-adjustable or MOD Series shocks
- Clearance for a 3in bumper exit exhaust
- Works with factory-located or modified inboard leaf spring mounts
- All necessary installation hardware included; made in the USA
- Part number: R155-175
Vehicle Applications:
- 1970 Dodge Challenger
- 1971 Dodge Challenger
- 1972 Dodge Challenger
- 1973 Dodge Challenger
- 1974 Dodge Challenger
- 1970 Plymouth Barracuda
- 1971 Plymouth Barracuda
- 1972 Plymouth Barracuda
- 1973 Plymouth Barracuda
- 1974 Plymouth Barracuda
FAQ
Which rear axles does it work with?
The system works with popular rear axles including the Mopar 8-3/4in and Ford 9in rear ends.
Does installation require welding?
Installation requires a small amount of cutting and welding on the frame and axle housing. The kit works with factory-located or modified inboard leaf spring mounts.
Does this kit bolt in?
This QA1 kit is designed as a bolt-in installation for the 70-74 Mopar E-Body using common hand tools, and it ships with the necessary hardware.
Are the shocks adjustable?
Yes. The QA1 coil-over shocks allow ride height adjustment and shock valving adjustment so the ride can be tuned for street or performance use.
Is a warranty included?
QA1 single and double adjustable shocks are eligible for a best-in-class Limited Lifetime Warranty with registration at QA1.net/warranty.
Where is it made?
QA1 suspension is made in the USA in Lakeville, Minnesota.

