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QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bearing Mount - 9.5in/12.75in - Alum

SKU: QAPDS303

Coilover Shocks and Struts

QAP Coil Shocks - Proma Star...

Qa1

QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bearing Mount - 9.5in/12.75in - Alum

SKU: QAPDS303

Coilover Shocks and Struts

QAP Coil Shocks - Proma Star...

A$579.79
LAST ONE! Est Ship 3-5 days. In stock at 2 locations (more than 10 available)

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Description

Shock - Proma Star - Twintube - 9.50 in Compressed / 12.63 in Extended - 2.00 in OD - Single Adjustable - Threaded Aluminum - Natural - Each

QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bearing Mount - 9.5in/12.75in - Alum

Additional Information

Proma Star single adjustable custom mount coil-over shock. Compressed height of 9-1/2", extended height of 12-3/4". Bearing top and bearing bottom.

Part Type

Coilover

Product Overview

QA1?s Proma Star Coil-Overs help you gain the benefits of coil-over shocks on a huge range of vehicles. Building a custom chassis or suspension components? Can?t find direct-fit options for your vehicle? These are for you. Available with 3" to 9" of stroke and single- or double-adjustable valving, QA1 shocks instantly upgrade ride quality and performance. The shock and included hardware kit provide quick and easy ride height adjustability to get the perfect stance. Just add a 2.5" spring of the appropriate length and spring rate to get rolling. Choose from single- or double-adjustable valving to dial in ride comfort and performance. Single-adjustable shocks work great for street cars, softening or stiffening the overall ride with one knob. , , Double-adjustable shocks are ideal for cars that see consistent track time or drivers who want to fine tune their ride quality. Independent compression and rebound tuning make this shock equally at home on the street, drag strip and road course. Choose from multiple mounting configurations. The poly bushing option includes ?" and 5/8" sleeves, while helping to reduce NVH. Bearing mount shocks minimize deflection and work well if your mounts require misalignment. Other mounting styles are available (sold separately) for T-Bar and stud-mount applications. Extended eyelets can also be used. All QA1 Proma Star shocks are made in the USA and dyno tested to ensure performance and quality. They are eligible for an industry-leading Limited Lifetime Warranty. Register shocks at QA1.net/warranty before installation. Fitment Notes, , Ensure your shock will have an adequate amount of travel to avoid overextending or bottoming out the shock, , Available spanner wrenches and thrust bearings increase ease of ride height adjustment, , If using a stock spring pocket, ensure you can achieve your desired ride height while incorporating enough shock travel

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

Features

  • Achieve the perfect balance of ride quality and performance with simultaneous tuning of rebound and compression.
  • Easily adjust your ride height for the perfect stance.
  • Limited Lifetime Warranty for peace of mind.
  • Multiple bushing or bearing configurations available to fit your needs.
  • Proudly made in the USA.

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

Brand:QA1
Description:QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bearing Mount - 9.5in/12.75in - Alum
Manufacturer Part Number:DS303
Part Number:qapDS303
Title:QA1 Shock Absorber DS303
UPC:806990059673

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 11:55:30

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Qa1
StreetFX SKU qapDS303
SFX Item ID 4093376
Accounting SKU qap-DS303
Manufacturer SKU DS303
Manufacturer UPC 806990059673
Alternative References DS303, QA1-DS303, QA1DS303

Coilover Shock, Proma Star, Single-Adjustable, Aluminum Body, Clear Anodized, Twin-Tube, 12.750 in. Extended, 9.500 in. Collapsed, Each

QA1 Proma Star externally adjustable coilover shocks and struts provide just the right combination of consistency, reaction, and durability for drag racing. They have special valving, which is designed to compensate for high shaft speed, while allowing for low shaft speed control. When combined with the 18 externally adjustable valve settings, they ensure an improved grip on the track from end to end. Other features include a bright-anodized aluminum body, PTFE-lined bearings or polyurethane bushings, a 5/8 in. centerless-ground chrome piston rod, and aerospace-caliber sealing materials.

Product Attributes
BrandQA1
Manufacturer's Part NumberDS303
Part TypeCoilover Shocks and Struts
Product LineQA1 Proma Star Coilover Shocks and Struts
UPC806990059673
Coilover Shock TypeSingle-adjustable
Shock Body MaterialAluminum
Shock Body FinishSilver
Adjustable ValvingYes
Number of Valving Selections18
Extended Length (in.)12.75
Collapsed Length (in.)9.50
Upper MountBearing
Lower MountBearing
Internal DesignTwin-tube
Gas ChargedNo
Body Diameter (in.)2.000
Bushing MaterialSteel
Bushing ColorNatural
Coilover Springs IncludedNo
Recommended Spring Diameter (in.)2.50 in.
Recommended Minimum Spring Length (in.)7.00 in.
Recommended Maximum Spring Length (in.)9.00 in.
Adjustable Mounting Bracket IncludedNo
Hardware IncludedYes
QuantitySold individually.

Manufacturer Attributes
Title QA1 Shock Absorber DS303
Brand QA1
Manufacturer Part Number DS303
UPC 806990059673
Manufacturer Designation Shock Proma C-O S-Adj 9.50 -12.75 Eye-B/Eye-B
Product Class Suspension Shock Absorber
Construction/Type Proma Star single adjustable custom mount coil-over shock. Compressed height of 9-1/2", extended height of 12-3/4". Bearing top and bearing bottom.
Product Outline Easily adjust your ride height for the perfect stance.
Achieve the perfect balance of ride quality and performance with simultaneous tuning of rebound and compression.
Multiple bushing or bearing configurations available to fit your needs.
Limited Lifetime Warranty for peace of mind.
Proudly made in the USA.
Vehicle Brief QA1 Proma Star Shock
Market Description QA1?s Proma Star Coil-Overs help you gain the benefits of coil-over shocks on a huge range of vehicles. Building a custom chassis or suspension components? Can?t find direct-fit options for your vehicle? These are for you. Available with 3" to 9" of stroke and single- or double-adjustable valving, QA1 shocks instantly upgrade ride quality and performance. The shock and included hardware kit provide quick and easy ride height adjustability to get the perfect stance. Just add a 2.5" spring of the appropriate length and spring rate to get rolling. Choose from single- or double-adjustable valving to dial in ride comfort and performance. Single-adjustable shocks work great for street cars, softening or stiffening the overall ride with one knob. , , Double-adjustable shocks are ideal for cars that see consistent track time or drivers who want to fine tune their ride quality. Independent compression and rebound tuning make this shock equally at home on the street, drag strip and road course. Choose from multiple mounting configurations. The poly bushing option includes ?" and 5/8" sleeves, while helping to reduce NVH. Bearing mount shocks minimize deflection and work well if your mounts require misalignment. Other mounting styles are available (sold separately) for T-Bar and stud-mount applications. Extended eyelets can also be used. All QA1 Proma Star shocks are made in the USA and dyno tested to ensure performance and quality. They are eligible for an industry-leading Limited Lifetime Warranty. Register shocks at QA1.net/warranty before installation. Fitment Notes, , Ensure your shock will have an adequate amount of travel to avoid overextending or bottoming out the shock, , Available spanner wrenches and thrust bearings increase ease of ride height adjustment, , If using a stock spring pocket, ensure you can achieve your desired ride height while incorporating enough shock travel

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