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Qa1

QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 750lbs/in - Flat Large - Aluminum

SKU: QAPGS401-10750C

Coilover Kits

QAP Coil-Overs - Pro Coil...

Qa1

QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 750lbs/in - Flat Large - Aluminum

SKU: QAPGS401-10750C

Coilover Kits

QAP Coil-Overs - Pro Coil...

A$1,881.48
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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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

These QA1 GM Pro Coil Systems are a great 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, Non-Adjustable Pro Coil System Features: Steel, Stock Appearing Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, 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 with simultanious adjustment 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 - Single Adj. - 10in x 750lbs/in - Flat Large - Aluminum
Grade Type:Performance
Internal Construction Type:Dual Tube
Manufacturer Part Number:GS401-10750C
Part Number:qapGS401-10750C
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 GS401-10750C
UPC:806990146700

Part Type

Coilover Set

Data: v4.2 - Upd: 2026-10-13 18:02:22

Features

  • Achieve the ultimate balance of ride quality and performance with simultanious adjustment 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
GS401-10750C
Product Attributes - Part Type
Coilover Kits
Product Attributes - Product Line
QA1 Pro Coilover Systems
Product Attributes - UPC
806990146700
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
Twin-tube
Product Attributes - Coilover Springs Included
Yes
Product Attributes - Spring Rate (lbs./in.)
750 lbs./in.
Product Attributes - Suspension Height Adjustment
0.0-2.0 in. lowered
Product Attributes - Recommended Front-End Weight
2,401-2,600 lbs.
Product Attributes - Gas Charged
No
Product Attributes - Extended Length (in.)
12.88
Product Attributes - Collapsed Length (in.)
8.63
Product Attributes - Threaded Adjustment Range
3.000 in.
Product Attributes - Upper Mount
Stud
Product Attributes - Lower Mount
T-bar
Product Attributes - Shock Body Material
Aluminum
Product Attributes - Shock Body Finish
Silver
Product Attributes - Bushing Material
Polyurethane
Product Attributes - Bushing Color
Black
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 big block engines. Coilover shocks are single adjustable Pro series GS401 shocks. Springs are 10 in. tapered with a large diameter, flat upper end style 10HTBF750 springs.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapGS401-10750C
SFX Item ID 4093650
Supplier Item Code 4093650
Manufacturer SKU GS401-10750C
Manufacturer UPC 806990146700
Alternative References qa1, QA1-GS401-10750C, 10in, 750lbs/in

Brochures

Compatibility

Application Data
  • MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeL6
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
    Engine VIN CodeD
  • MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CID260
    Liter4.3
    Engine Size4.3L/260
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeF
  • MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeJ
  • MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeL6
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
    Engine VIN CodeD
  • MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CID260
    Liter4.3
    Engine Size4.3L/260
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeF
  • MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeJ
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeJ
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeT
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeU
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeV
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeW
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeP
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV8
    CC7456
    CID455
    Liter7.5
    Engine Size7.5L/455
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeR
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1975
    Ending Year1977
    Engine TypeV6
    CID231
    Liter3.8
    Engine Size3.8L/231
    Engine FamilyGM V6
    DrivetrainRWD
    Engine VIN CodeC
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1975
    Ending Year1977
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1975
    Ending Year1977
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeJ
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    CID305
    Liter5.0
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
    Engine VIN CodeU
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    DrivetrainRWD
    Engine VIN CodeL
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeR
  • MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1977
    Engine TypeV6
    CID231
    Liter3.8
    Engine Size3.8L/231
    Engine FamilyGM V6
    DrivetrainRWD
    Engine VIN CodeC
  • MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1977
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1977
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyOldsmobile V8
    DrivetrainRWD
    Engine VIN CodeJ

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