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Qa1

QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat - Aluminum

SKU: QAPGS401-10550B

Coilover Kits

QAP Coil-Overs - Pro Coil...

Qa1

QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat - Aluminum

SKU: QAPGS401-10550B

Coilover Kits

QAP Coil-Overs - Pro Coil...

A$1,916.94
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

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

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

  • QA1 uniquely engineered to enhance the performance of your vehicle
  • Ride height adjustability
  • Adjustable shock valving options for all driving styles
  • Easy bolt-in install
  • Best-in-class warranty
  • 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 550lbs/in - Flat - Aluminum
Grade Type:Performance
Internal Construction Type:Dual Tube
Manufacturer Part Number:GS401-10550B
Part Number:qapGS401-10550B
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 Coilover Spring and Shock Assembly GS401-10550B
UPC:806990062116

Part Type

Coilover Set

Data: v4.2 - Upd: 2026-10-14 17:06:51

Features

  • Adjustable shock valving options for all driving styles
  • Best-in-class warranty
  • Easy bolt-in install
  • Made in the USA
  • QA1 uniquely engineered to enhance the performance of your vehicle
  • Ride height adjustability

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
GS401-10550B
Product Attributes - Part Type
Coilover Kits
Product Attributes - Product Line
QA1 Pro Coilover Systems
Product Attributes - UPC
806990062116
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.)
550 lbs./in.
Product Attributes - Suspension Height Adjustment
0.0-2.0 in. lowered
Product Attributes - Recommended Front-End Weight
2,101-2,200 lbs.
Product Attributes - Gas Charged
No
Product Attributes - Extended Length (in.)
14.00
Product Attributes - Collapsed Length (in.)
10.13
Product Attributes - Threaded Adjustment Range
3.000 in.
Product Attributes - Upper Mount
Stud
Product Attributes - Lower Mount
Bar pin
Product Attributes - Body Diameter (in.)
2.000
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 flat upper end style 10HTSF550 springs.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapGS401-10550B
SFX Item ID 4093642
Supplier Item Code 4093642
Manufacturer SKU GS401-10550B
Manufacturer UPC 806990062116
Alternative References qa1, QA1GS401-10550B, 10in, 550lbs/in

Brochures

Compatibility

Application Data
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeH
  • MakeBUICK
    ModelSKYLARK
    Submodel350
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    CC5733
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
    Engine VIN CodeJ
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV8
    CC6555
    CID400
    Liter6.6
    Engine Size6.6L/400
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1971
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1968
    Ending Year1971
    Engine TypeL6
    CC4098
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1970
    Ending Year1970
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1970
    Ending Year1970
    Engine TypeL6
    CC4097
    CID250
    Liter4.1
    Engine Size4.1L/250
    Engine FamilyGM inline 6-cylinder
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    CID350
    Liter5.7
    Engine Size5.7L/350
    Engine FamilyBuick V8
    DrivetrainRWD

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