The QA1 Pro Coil front coil-over system modernizes the front suspension of 1967-1973 Ford Mustangs with a bolt-in single adjustable design. It pairs a lightweight billet aluminum coil-over shock with a 10" coil spring rated at 400 lb/in, and a single knob adjusts rebound and compression together across 18 settings for street or performance driving. The fully threaded shock body sets ride height from factory height down to 2 inches lower with no cutting or welding, and the system works with factory or QA1 tubular control arms. Each shock is 100 percent dyno tested and serialized and made in the USA.
Specifications:
- Lightweight billet aluminum coil-over shock
- Fully threaded shock body for ride height adjustment
- Single adjustable shock, 18 settings of simultaneous rebound and compression adjustment
- 10" coil-over spring rated at 400 lb/in
- 100 percent dyno tested and serialized
- Bolt-in installation
- Made in the USA
- Sold as a pair
- Part number: MS402-10400C
Vehicle Applications:
- 1967 Ford Mustang
- 1968 Ford Mustang
- 1969 Ford Mustang
- 1970 Ford Mustang
- 1971 Ford Mustang
- 1972 Ford Mustang
- 1973 Ford Mustang
FAQ
What does this QA1 Pro Coil system fit?
This system is an application-specific front coil-over kit for 1967-1973 Ford Mustangs. See the Vehicle Applications list for the exact years and models covered.
Is this a single or double adjustable coil-over?
It uses single adjustable shocks, which adjust rebound and compression together through 18 settings with one knob.
How much can ride height be lowered?
The fully threaded shock body allows ride height from factory height down to about 2 inches lower.
Does installation require cutting or welding?
No. The Pro Coil system is a bolt-in design that installs with basic hand tools and works with factory or QA1 tubular control arms.
What spring rate is included?
This kit includes 10" coil springs with a 400 lb/in spring rate and is sold as a pair.

