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Qa1

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

SKU: QAPGD401-10550B

Coilover Kits

QAP Coil-Overs - Pro Coil...

Qa1

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

SKU: QAPGD401-10550B

Coilover Kits

QAP Coil-Overs - Pro Coil...

A$2,392.21
IN STOCK! Est Ship 3-7 Days days. In stock at 1 location (only 1 available)

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Description

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

Additional Information

Front Pro Coil double adjustable stock mount shock kit. Compressed length of 10.13" and extended length of 14". Includes 10" spring with rating of 550 and has a tapered flat end.

Part Type

Coilover Set

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

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
qapHK22-GMG2 QA1 Level 2 Full Vehicle Handling Suspension Kits for 1969-1972 GRAND PRIX, 1970-1972 MONTE CARLO - HK22-GMG2 HANDLING KIT LEVEL 2, G-PRIX, MONTE; GM, 69-72 G-BODY, W/ SHOCKS

Data: v4.2 - Upd: 2026-11-09 19:42:54

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.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

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. - 10in x 550lbs/in - Flat - Aluminum
Grade Type:Performance
Internal Construction Type:Dual Tube
Manufacturer Part Number:GD401-10550B
Part Number:qapGD401-10550B
Remote Reservoir:No
Spring Color:Silver
Spring Material:High Tensile Chrome Silicon
Title:QA1 Shock Absorber and Coil Spring Assembly GD401-10550B
UPC:806990062536

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 16:13:12

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Qa1
StreetFX SKU qapGD401-10550B
SFX Item ID 4093486
Accounting SKU qap-GD401-10550B
Manufacturer SKU GD401-10550B
Manufacturer UPC 806990062536
Alternative References GD401-10550B, QA1-GD401-10550B

Coilover Kit, Pro Coilover System, Front, Double Adjustable, Buick, Chevy, GMC, Oldsmobile, Pontiac, Pair

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 Attributes
BrandQA1
Manufacturer's Part NumberGD401-10550B
Part TypeCoilover Kits
Product LineQA1 Pro Coilover Systems
UPC806990062536
Coilover Kit PositionFront
Adjustable ValvingYes
Number of Valving Selections324
Shocks IncludedYes
Internal DesignTwin-tube
Coilover Springs IncludedYes
Spring Rate (lbs./in.)550 lbs./in.
Suspension Height Adjustment0.0-2.0 in. lowered
Recommended Front-End Weight2,101-2,200 lbs.
Gas ChargedNo
Extended Length (in.)12.88
Collapsed Length (in.)8.63
Threaded Adjustment Range3.000 in.
Upper MountStud
Lower MountBar pin
Shock Body MaterialAluminum
Shock Body FinishSilver
Bushing MaterialPolyurethane
Bushing ColorBlack
Spring FinishGray/Silver
Crossmember IncludedNo
Adjustable Mounting Bracket IncludedNo
Hardware IncludedYes
Welding RequiredNo
QuantitySold as a pair.
NotesDesigned to fit applications with big block engines. Coilover shocks are double adjustable Pro series GD401 shocks. Springs are 10 in. tapered with a flat upper end style 10HTSF550 springs.

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