The QA1 GM Pro Front Coil-Over System brings fully adjustable ride height and valving control to full-size and Corvette platforms. A lightweight billet aluminum coil-over shock with a fully threaded body allows the ride height to be set for the desired stance or to fine-tune weight balance for better handling. The American-made high-travel spring runs fewer coils and a smaller wire diameter for increased travel, lower unsprung weight and quicker response. This double adjustable system is 100 percent dyno tested and serialized, rebuildable by QA1 authorized service centers, installs with a straightforward bolt-in fitment, and is made in the USA. Sold in pairs.
Specifications:
- Type: QA1 Pro front coil-over system (sold in pairs)
- Adjustability: Double Adjustable (18-way independent compression and rebound)
- Shock body: Billet Aluminum, fully threaded
- Spring: 10in length, 450 lb/in rate, high-travel
- Spring/mount style: Flat Large
- Installation: bolt-in
- Warranty: Limited Lifetime
- Made in: USA
- Part number: GD507-10450C
Vehicle Applications:
- 1958 Chevrolet Bel Air
- 1959 Chevrolet Bel Air
- 1960 Chevrolet Bel Air
- 1961 Chevrolet Bel Air
- 1962 Chevrolet Bel Air
- 1963 Chevrolet Bel Air
- 1964 Chevrolet Bel Air
- 1965 Chevrolet Bel Air
- 1966 Chevrolet Bel Air
- 1967 Chevrolet Bel Air
- 1968 Chevrolet Bel Air
- 1969 Chevrolet Bel Air
- 1970 Chevrolet Bel Air
- 1971 Chevrolet Bel Air
- 1972 Chevrolet Bel Air
- 1973 Chevrolet Bel Air
- 1974 Chevrolet Bel Air
- 1975 Chevrolet Bel Air
- 1958 Chevrolet Biscayne
- 1959 Chevrolet Biscayne
- 1960 Chevrolet Biscayne
- 1961 Chevrolet Biscayne
- 1962 Chevrolet Biscayne
- 1963 Chevrolet Biscayne
- 1964 Chevrolet Biscayne
- 1965 Chevrolet Biscayne
- 1966 Chevrolet Biscayne
- 1967 Chevrolet Biscayne
- 1968 Chevrolet Biscayne
- 1969 Chevrolet Biscayne
- 1970 Chevrolet Biscayne
- 1971 Chevrolet Biscayne
- 1972 Chevrolet Biscayne
- 1966 Chevrolet Caprice
- 1967 Chevrolet Caprice
- 1968 Chevrolet Caprice
- 1969 Chevrolet Caprice
- 1970 Chevrolet Caprice
- 1971 Chevrolet Caprice
- 1972 Chevrolet Caprice
- 1973 Chevrolet Caprice
- 1974 Chevrolet Caprice
- 1975 Chevrolet Caprice
- 1976 Chevrolet Caprice
- 1977 Chevrolet Caprice
- 1978 Chevrolet Caprice
- 1979 Chevrolet Caprice
- 1980 Chevrolet Caprice
- 1981 Chevrolet Caprice
- 1982 Chevrolet Caprice
- 1983 Chevrolet Caprice
- 1984 Chevrolet Caprice
- 1985 Chevrolet Caprice
- 1986 Chevrolet Caprice
- 1987 Chevrolet Caprice
- 1988 Chevrolet Caprice
- 1989 Chevrolet Caprice
- 1990 Chevrolet Caprice
- 1991 Chevrolet Caprice
- 1958 Chevrolet Del Ray
- 1971 Chevrolet Impala
- 1972 Chevrolet Impala
- 1973 Chevrolet Impala
- 1974 Chevrolet Impala
- 1975 Chevrolet Impala
- 1976 Chevrolet Impala
- 1977 Chevrolet Impala
- 1978 Chevrolet Impala
- 1979 Chevrolet Impala
- 1980 Chevrolet Impala
- 1981 Chevrolet Impala
- 1982 Chevrolet Impala
- 1983 Chevrolet Impala
- 1984 Chevrolet Impala
- 1985 Chevrolet Impala
- 1994 Chevrolet Impala
- 1995 Chevrolet Impala
- 1996 Chevrolet Impala
- 1960 Edsel Ranger
- 1960 Ford Galaxie
- 1961 Ford Galaxie
- 1962 Ford Galaxie
- 1963 Ford Galaxie
- 1964 Ford Galaxie
- 1960 Mercury Country Cruiser
- 1963 Mercury Country Cruiser
- 1963 Mercury Marauder
- 1964 Mercury Marauder
- 1961 Mercury Meteor
- 1962 Mercury Meteor
- 1963 Mercury Meteor
- 1960 Mercury Monterey
- 1961 Mercury Monterey
- 1962 Mercury Monterey
- 1963 Mercury Monterey
- 1964 Mercury Monterey
FAQ
What does QA1 part number GD507-10450C fit?
QA1 GD507-10450C is listed to fit 1958-1996 Full-Size Chevy, Ford & Mercury. 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 double adjustable version, which provides independent compression and rebound valving adjustment so ride and handling can be tuned separately.
What spring is included?
It is supplied with a QA1 high-travel spring measuring 10in in length with a 450 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.
