The QA1 GM Pro Coil System is a front coil-over conversion for full-size applications that calls for fully adjustable ride height and valving control. The fully threaded billet aluminum shock body sets ride height for the desired stance and helps fine-tune weight balance, while the single adjustable valving tunes the ride. QA1's American-made lightweight high travel springs use fewer coils and a smaller wire diameter for increased travel, reduced unsprung weight and faster response. It works with factory or upgraded QA1 tubular control arms, bolts in and is made in the USA.
Specifications:
- Type: front coil-over system (Pro Coil)
- Adjustability: single adjustable valving
- Spring: 10in high travel spring, 450 lb/in rate
- Spring seat: flat, large
- Shock body: lightweight billet aluminum, fully threaded
- Ride height adjustable
- Works with factory or QA1 tubular control arms
- 100% dyno tested and serialized
- Bolt-in installation
- Made in the USA
- Sold in pairs
- Part number: GS507-10450C
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
Is this coil-over system adjustable?
Yes. It uses QA1 single adjustable coil-over shocks with ride height adjustment through the fully threaded aluminum shock body, plus valving adjustment to tune the ride for street, autocross, road racing or drag use.
What spring is included?
The system is built around a 10in high travel spring with a 450 lb/in rate. The lightweight high travel spring design uses fewer coils and a smaller wire diameter for increased travel and reduced unsprung weight.
Is it sold as a pair?
Yes. The QA1 Pro Coil front system is sold in pairs and installs as a bolt-in upgrade.
Where is it made?
QA1 coil-over shocks are made in the USA, and every shock is 100% dyno tested and serialized.
