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 double 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: 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
- Installation: bolt-in
- Warranty: Limited Lifetime
- Made in: USA
- Part number: GD401-10450B
Vehicle Applications:
- 1968 Buick Skylark
- 1969 Buick Skylark
- 1970 Buick Skylark
- 1971 Buick Skylark
- 1972 Buick Skylark
- 1968 Buick Special
- 1969 Buick Special
- 1968 Chevrolet Chevelle
- 1969 Chevrolet Chevelle
- 1970 Chevrolet Chevelle
- 1971 Chevrolet Chevelle
- 1972 Chevrolet Chevelle
- 1968 Chevrolet El Camino
- 1969 Chevrolet El Camino
- 1970 Chevrolet El Camino
- 1971 Chevrolet El Camino
- 1972 Chevrolet El Camino
- 1971 GMC Sprint
- 1972 GMC Sprint
- 1968 Oldsmobile 442
- 1969 Oldsmobile 442
- 1970 Oldsmobile 442
- 1971 Oldsmobile 442
- 1968 Oldsmobile Cutlass
- 1969 Oldsmobile Cutlass
- 1970 Oldsmobile Cutlass
- 1971 Oldsmobile Cutlass
- 1972 Oldsmobile Cutlass
- 1968 Oldsmobile Vista Cruiser
- 1969 Oldsmobile Vista Cruiser
- 1970 Oldsmobile Vista Cruiser
- 1971 Oldsmobile Vista Cruiser
- 1972 Oldsmobile Vista Cruiser
- 1968 Pontiac GTO
- 1969 Pontiac GTO
- 1970 Pontiac GTO
- 1971 Pontiac GTO
- 1972 Pontiac GTO
- 1968 Pontiac LeMans
- 1969 Pontiac LeMans
- 1970 Pontiac LeMans
- 1971 Pontiac LeMans
- 1972 Pontiac LeMans
- 1968 Pontiac Tempest
- 1969 Pontiac Tempest
- 1970 Pontiac Tempest
FAQ
What does QA1 part number GD401-10450B fit?
QA1 GD401-10450B is listed to fit 1968-1972 Chevelle, Cutlass, GTO & Skylark. 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.
