# QA1 GM Pro Front Coil-Over System - Double Adj. - 9in x 450lbs/in - Pigtail Large - Aluminum

QA1's GM Pro Coil Systems are available for 1963-1982 Corvettes and for 1958-1970 Full Size Chevrolet vehicles, including Impalas, Bel Airs and Caprices. They are the perfect option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. Specially designed for QA1's Pro Coil Systems, the American-made lightweight high travel springs have fewer coils and a smaller wire diameter, resulting in increased travel due to the larger distance between the coils. They reduce unsprung weight and react faster, optimizing suspension performance. Multiple spring rate options are also available and have been successfully tested in various applications, from casual street driving to hard core race applications. Adjustable Pro Coil System Features:, Available in independent compression and rebound double adjustable, simultaneous compression and rebound adjustable, or drag "R" Series adjustable, Lightweight Billet Aluminum Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, 100% Dyno Tested and Serialized, Serviceable and Rebuildable by QA1 Authorized Service Centers, Made in the USA, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs.

-   Achieve the ultimate balance of ride quality and performance handling with independent tuning of rebound and compression valving.
-   Easy bolt-in installation that works with your factory or upgraded QA1 tubular control arms.
-   Up to 2 of ride height adjustment allows you to dial in the perfect stance.
-   Limited Lifetime Warranty for peace of mind.
-   Proudly made in the USA

This Part Fits:

Year

Make

Model

Submodel

1958-1975

Chevrolet

Bel Air

Base

1958-1972

Chevrolet

Biscayne

Base

1960

Chevrolet

Biscayne

Fleetmaster

1966-1972,1986-1991

Chevrolet

Caprice

Base

1973-1991

Chevrolet

Caprice

Classic

1986-1990

Chevrolet

Caprice

Classic Brougham

1976-1978,1981-1982

Chevrolet

Caprice

Classic Estate

1976-1981

Chevrolet

Caprice

Classic Landau

1987-1990

Chevrolet

Caprice

Classic LS Brougham

1991

Chevrolet

Caprice

Classic LTZ

1975-1976,1979-1980

Chevrolet

Caprice

Classic Sport

1973-1974

Chevrolet

Caprice

Estate

1975

Chevrolet

Caprice

Estate Wagon

1963-1974,1977-1982

Chevrolet

Corvette

Base

1982

Chevrolet

Corvette

Collector's Edition

1978

Chevrolet

Corvette

Indianapolis 500 Pace Car

1978

Chevrolet

Corvette

Silver Anniversary Edition

1975-1976

Chevrolet

Corvette

Stingray

1958

Chevrolet

Del Ray

Base

1971-1985

Chevrolet

Impala

Base

1975-1977

Chevrolet

Impala

Custom

1976

Chevrolet

Impala

Custom Landau

1981-1982

Chevrolet

Impala

Estate

1977-1979

Chevrolet

Impala

Landau

1976

Chevrolet

Impala

S

1975-1976,1979-1980

Chevrolet

Impala

Sport

1994-1996

Chevrolet

Impala

SS

## Details

- **Price:** 1354.39 CAD
- **Vendor:** QA1
- **Type:** Coilovers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1354.39 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Photo - Close Up
- Photo - out of package
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/qa1-gm-pro-front-coil-over-system-double-adj-9in-x-450lbs-in-pigtail-large-aluminum)
> Updated: 2026-06-28