The QA1 GM Pro Front Coil-Over System delivers fully adjustable ride height and valving control for classic GM muscle. Built around a lightweight billet aluminum coil-over shock with a fully threaded body, it lets the ride height be dialed in for the right stance or to fine-tune weight balance for improved handling. The American-made high-travel spring uses fewer coils and a smaller wire diameter for added travel, reduced unsprung weight and faster reaction. This single adjustable version is 100 percent dyno tested and serialized, rebuildable by QA1 authorized service centers, bolts in with factory or upgraded QA1 tubular control arms, and is made in the USA. Sold in pairs.
Specifications:
- Type: QA1 Pro front coil-over system (sold in pairs)
- Adjustability: Single Adjustable (independent valving adjustment)
- Shock body: Billet Aluminum, fully threaded
- Spring: 10in length, 400 lb/in rate, high-travel
- Spring/mount style: Flat Large
- Installation: bolt-in
- Warranty: Limited Lifetime
- Made in: USA
- Part number: GS501-10400C
Vehicle Applications:
- 1970 Chevrolet Camaro
- 1971 Chevrolet Camaro
- 1972 Chevrolet Camaro
- 1973 Chevrolet Camaro
- 1974 Chevrolet Camaro
- 1975 Chevrolet Camaro
- 1976 Chevrolet Camaro
- 1977 Chevrolet Camaro
- 1978 Chevrolet Camaro
- 1979 Chevrolet Camaro
- 1980 Chevrolet Camaro
- 1981 Chevrolet Camaro
- 1970 Pontiac Firebird
- 1971 Pontiac Firebird
- 1972 Pontiac Firebird
- 1973 Pontiac Firebird
- 1974 Pontiac Firebird
- 1975 Pontiac Firebird
- 1976 Pontiac Firebird
- 1977 Pontiac Firebird
- 1978 Pontiac Firebird
- 1979 Pontiac Firebird
- 1980 Pontiac Firebird
- 1981 Pontiac Firebird
FAQ
What does QA1 part number GS501-10400C fit?
QA1 GS501-10400C is listed to fit 1970-1981 Camaro & Firebird. The Vehicle Applications list above shows the individual years, makes and models from the QA1 fitment data for this part.
Is this coil-over single or double adjustable?
This is the single adjustable version, which adjusts compression and rebound valving together through one adjustment for simple tuning.
What spring is included?
It is supplied with a QA1 high-travel spring measuring 10in in length with a 400 lb/in spring rate.
Can ride height be adjusted?
Yes. The fully threaded shock body allows the ride height to be adjusted to set the stance or fine-tune weight balance.
Is professional installation required?
The system is designed as a bolt-in installation using standard hand tools, so no welding or fabrication is required for a typical fitment.
