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Qa1

QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bushing Mount - 15in/23.125in - Alum

SKU: QAPDS903

Coilover Shocks and Struts

QAP Coil Shocks - Proma Star...

Qa1

QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bushing Mount - 15in/23.125in - Alum

SKU: QAPDS903

Coilover Shocks and Struts

QAP Coil Shocks - Proma Star...

A$588.48
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

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Description

QA1 Proma Star Series Coil-Over Shock Absorber - Single Adj. - Bushing Mount - 15in/23.125in - Alum

Additional Information

Proma Star single adjustable custom mount coil-over shock. Compressed height of 15", extended height of 23-5/8". Stud top and bushing bottom.

Part Type

Coilover

Product Overview

With QA1's Proma Star single adjustable coil-over shock, you can easily adjust your compression and rebound valving and get the hard-core performance you need. One knob allows you to choose from 18 valving options that adjust both compression and rebound valving simultaneously, allowing total suspension control in one easy-to-reach location. Simultaneous Compression and Rebound Adjustment, Coil-Over, Lightweight Aluminum, Ride Height Adjustable, Spring Mounting Hardware Included, 100% Dyno Tested and Serialized, Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers, American Made, Precision Machined Aluminum Piston with PTFE Piston Band, 5/8" Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System.

Data: v4.2 - Upd: 2026-11-09 11:08:32

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. - Bushing Mount - 15in/23.125in - Alum
Manufacturer Part Number:DS903
Part Number:qapDS903
Title:QA1 Shock Absorber DS903
UPC:806990063885

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 11:55:32

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Qa1
StreetFX SKU qapDS903
SFX Item ID 4093404
Accounting SKU qap-DS903
Manufacturer SKU DS903
Manufacturer UPC 806990063885
Alternative References DS903, QA1-DS903

Coilover Shock, Proma Star, Single-Adjustable, Aluminum Body, Clear Anodized, Twin-Tube, 23.625 in. Extended, 15.000 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 NumberDS903
Part TypeCoilover Shocks and Struts
Product LineQA1 Proma Star Coilover Shocks and Struts
UPC806990063885
Coilover Shock TypeSingle-adjustable
Shock Body MaterialAluminum
Shock Body FinishSilver
Adjustable ValvingYes
Number of Valving Selections18
Extended Length (in.)23.63
Collapsed Length (in.)15.00
Upper MountStud
Lower MountEyelet
Internal DesignTwin-tube
Gas ChargedNo
Body Diameter (in.)2.000
Bushing MaterialPolyurethane
Bushing ColorBlack
Coilover Springs IncludedNo
Recommended Spring Diameter (in.)2.50 in.
Recommended Minimum Spring Length (in.)14.00 in.
Adjustable Mounting Bracket IncludedNo
Hardware IncludedYes
QuantitySold individually.

Manufacturer Attributes
Title QA1 Shock Absorber DS903
Brand QA1
Manufacturer Part Number DS903
UPC 806990063885
Manufacturer Designation Shock Proma C-O S-Adj 15 -23.75 Stud/Eye-P
Product Class Suspension Shock Absorber
Construction/Type Proma Star single adjustable custom mount coil-over shock. Compressed height of 15", extended height of 23-5/8". Stud top and bushing 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 With QA1's Proma Star single adjustable coil-over shock, you can easily adjust your compression and rebound valving and get the hard-core performance you need. One knob allows you to choose from 18 valving options that adjust both compression and rebound valving simultaneously, allowing total suspension control in one easy-to-reach location. Simultaneous Compression and Rebound Adjustment, Coil-Over, Lightweight Aluminum, Ride Height Adjustable, Spring Mounting Hardware Included, 100% Dyno Tested and Serialized, Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers, American Made, Precision Machined Aluminum Piston with PTFE Piston Band, 5/8" Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System.

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