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Qa1

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

SKU: QAPGD507-09450D

Coilover Kits

QAP Coil-Overs - Pro Coil

Qa1

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

SKU: QAPGD507-09450D

Coilover Kits

QAP Coil-Overs - Pro Coil

A$2,537.31
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

QA1 Pro coilover systems are engineered from the ground up to offer unmatched performance over stock suspension setups. Pro coilover systems utilize adjustable and non-adjustable coilover shocks and springs designed specifically for replacing the factory shocks and springs. This combination offers ride height adjustment and variable position valving adjustment (where applicable) for performance not found in other kits. Choose QA1 Pro coilover systems for your next suspension upgrade.

Product Overview

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.


Features and Benefits

  • Up to 2 of ride height adjustment allows you to dial in the perfect stance.
  • 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.
  • Limited Lifetime Warranty for peace of mind.
  • Proudly made in the USA

Product Details

Active or Passive Suspension:Passive
Adjustable Compression:Yes
Adjustable Rebound:Yes
Adjustable Ride Height:Yes
Assembled:No
Brand:QA1
Description:QA1 GM Pro Front Coil-Over System - Double Adj. - 9in x 450lbs/in - Pigtail Large - Aluminum
Grade Type:Performance
Internal Construction Type:Dual Tube
Manufacturer Part Number:GD507-09450D
Part Number:qapGD507-09450D
Prop 65 - Short Label:WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:Yes
Remote Reservoir:No
Spring Color:Silver
Spring Material:High Tensile Chrome Silicon
Title:QA1 Shock Absorber and Coil Spring Assembly GD507-09450D
UPC:806990139870

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb SKU Kit Title
qapDK02-GMB2 QA1 65-68 GM B-Body Level 2 Drag Kit 2.0 w/ Shocks (1x qap5251, 1x qap52700, 1x qap52701, 1x qap52826, 1x qap5289, 1x qap5294, 1x qap5297, 2x qap7888-109, 1x qapGD507-09450D, 1x qapRCK52389, 1x qapT114W)
qapDK02-GMB3 QA1 69-70 GM B-Body Level 2 Drag Kit 2.0 w/ Shocks (1x qap5251, 1x qap52700, 1x qap52701, 1x qap52826, 1x qap5289, 1x qap5294, 1x qap5298, 2x qap7888-109, 1x qapGD507-09450D, 1x qapRCK52389, 1x qapT114W)

Part Type

Coilover Set

Data: v4.2 - Upd: 2026-09-29 15:50:37

Features

  • 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.
  • Limited Lifetime Warranty for peace of mind.
  • Proudly made in the USA
  • Up to 2 of ride height adjustment allows you to dial in the perfect stance.

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
GD507-09450D
Product Attributes - Part Type
Coilover Kits
Product Attributes - Product Line
QA1 Pro Coilover Systems
Product Attributes - UPC
806990139870
Product Attributes - Coilover Kit Position
Front
Product Attributes - Adjustable Valving
Yes
Product Attributes - Number of Valving Selections
18
Product Attributes - Shocks Included
Yes
Product Attributes - Internal Design
Monotube
Product Attributes - Coilover Springs Included
Yes
Product Attributes - Spring Rate (lbs./in.)
450 lbs./in.
Product Attributes - Suspension Height Adjustment
0.0-2.0 in. lowered
Product Attributes - Recommended Front-End Weight
1,850-2,050 lbs.
Product Attributes - Gas Charged
No
Product Attributes - Extended Length (in.)
14.50
Product Attributes - Collapsed Length (in.)
9.63
Product Attributes - Upper Mount
Stud
Product Attributes - Lower Mount
Tie bar
Product Attributes - Shock Body Material
Aluminum
Product Attributes - Shock Body Finish
Silver
Product Attributes - Bushing Material
Spherical bearing
Product Attributes - Bushing Color
Natural
Product Attributes - Spring Finish
Gray/Silver
Product Attributes - Crossmember Included
No
Product Attributes - Adjustable Mounting Bracket Included
No
Product Attributes - Hardware Included
Yes
Product Attributes - Welding Required
No
Product Attributes - Quantity
Sold as a pair.
Product Attributes - Notes
Designed to fit applications with small block engines. Coilover shocks are double adjustable Pro series GD507 shocks. Springs are 9 in. tapered with a large diameter, pigtail upper end style 9HTSP450 springs.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapGD507-09450D
SFX Item ID 4093524
Supplier Item Code 4093524
Manufacturer SKU GD507-09450D
Manufacturer UPC 806990139870
Alternative References qa1, QA1-GD507-09450D, 9in, 450lbs/in

Brochures

Compatibility

Application Data
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1958
    Ending Year1961
    Engine TypeV8
    CC5704
    CID348
    Liter5.7
    Engine Size5.7L/348
    Engine FamilyChevy big block W-engines
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1958
    Ending Year1962
    Engine TypeL6
    CC3852
    CID235
    Liter3.8
    Engine Size3.8L/235
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1958
    Ending Year1967
    Engine TypeV8
    CC4638
    CID283
    Liter4.6
    Engine Size4.6L/283
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1959
    Ending Year1959
    Engine TypeV8
    CC5272
    CID322
    Liter5.3
    Engine Size5.3L/322
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1959
    Ending Year1960
    Engine TypeL6
    CC4278
    CID261
    Liter4.3
    Engine Size4.3L/261
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1960
    Ending Year1960
    Engine TypeL6
    CID236
    Liter3.9
    Engine Size3.9L/236
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1961
    Ending Year1965
    Engine TypeV8
    CC6704
    CID409
    Liter6.7
    Engine Size6.7L/409
    Engine FamilyChevy big block W-engines
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1962
    Ending Year1969
    Engine TypeV8
    CC5358
    CID327
    Liter5.3
    Engine Size5.3L/327
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1963
    Ending Year1963
    Engine TypeV8
    CC6997
    CID427
    Liter7.0
    Engine Size7.0L/427
    Engine FamilyChevy big block W-engines
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1963
    Ending Year1965
    Engine TypeL6
    CC3769
    CID230
    Liter3.8
    Engine Size3.8L/230
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1965
    Ending Year1969
    Engine TypeV8
    CC6489
    CID396
    Liter6.5
    Engine Size6.5L/396
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1965
    Ending Year1971
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1965
    Ending Year1971
    Engine TypeL6
    CC4098
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1966
    Ending Year1969
    Engine TypeV8
    CC6998
    CID427
    Liter7.0
    Engine Size7.0L/427
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV8
    CC5031
    CID307
    Liter5.0
    Engine Size5.0L/307
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1969
    Ending Year1971
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    CID400
    Liter6.6
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    CC6588
    CID402
    Liter6.6
    Engine Size6.6L/402
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    CC7439
    CID454
    Liter7.4
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    CC7441
    CID454
    Liter7.4
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC6588
    CID402
    Liter6.6
    Engine Size6.6L/402
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
    Engine VIN CodeS
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC6588
    CID402
    Liter6.6
    Engine Size6.6L/402
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC7439
    CID454
    Liter7.4
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
    Engine VIN CodeV
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC7439
    CID454
    Liter7.4
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
    Engine VIN CodeW
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC7441
    CID454
    Liter7.4
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    DrivetrainRWD
    Engine VIN CodeV

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