This QA1 GM Pro Coil System delivers fully adjustable ride height and valving control. It uses independent compression and rebound double adjustable valving in a lightweight billet aluminum body with a fully threaded body for ride height adjustment. The kit includes a 10 inch high travel spring rated at 450 with a tapered pigtail end. It has a compressed length of 10.13 inches and an extended length of 14 inches. These systems are sold in pairs, are 100 percent dyno tested, serialized and made in the USA, and are used in drag racing, street performance, autocross, road racing and street rod applications.
Specifications:
- Type: GM Pro Coil System (coil-over shock and spring)
- Valving: independent compression and rebound double adjustable
- Body: lightweight billet aluminum, fully threaded for ride height adjustment
- Spring: 10 in high travel, 450 rate, tapered pigtail end
- Compressed length: 10.13 in
- Extended length: 14 in
- Sold in pairs
- Made in the USA, dyno tested and serialized
- Part number: GD401-10450A
Vehicle Applications:
- 1973 Buick Apollo
- 1974 Buick Apollo
- 1967 Chevrolet Camaro
- 1968 Chevrolet Camaro
- 1969 Chevrolet Camaro
- 1968 Chevrolet Chevy II
- 1969 Chevrolet Nova
- 1970 Chevrolet Nova
- 1971 Chevrolet Nova
- 1972 Chevrolet Nova
- 1973 Chevrolet Nova
- 1974 Chevrolet Nova
- 1973 Oldsmobile Omega
- 1974 Oldsmobile Omega
- 1967 Pontiac Firebird
- 1968 Pontiac Firebird
- 1969 Pontiac Firebird
- 1971 Pontiac Ventura
- 1972 Pontiac Ventura
- 1973 Pontiac Ventura
- 1974 Pontiac Ventura
FAQ
What is included with the GD401-10450A Pro Coil System?
It includes QA1 billet aluminum double adjustable coil-over shocks with 10 inch 450 rate high travel springs and is sold in pairs.
What valving does this system use?
It uses independent compression and rebound double adjustable valving, so compression and rebound can be tuned separately.
Is the ride height adjustable?
Yes. The fully threaded shock body lets ride height be adjusted for the desired stance and corner weighting.
What vehicles does this kit fit?
It fits the GM applications listed in the vehicle applications section above.

