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Qa1

QA1 Pro Rear Weld-In Coil-Over System - RideSensitive - 12in x 175/350lbs/in - 3in Tube - Aluminum

SKU: QAPALN4000K

Coilover Kits

QAP Coil-Overs - Weld-In...

Qa1

QA1 Pro Rear Weld-In Coil-Over System - RideSensitive - 12in x 175/350lbs/in - 3in Tube - Aluminum

SKU: QAPALN4000K

Coilover Kits

QAP Coil-Overs - Weld-In...

A$1,911.25
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 Rear Weld-In Coil-Over System - RideSensitive - 12in x 175/350lbs/in - 3in Tube - Aluminum

Additional Information

Aluma Matic Pro Rear System. Includes 2 shocks, 2 springs and all mounting hardware. Springs are 175/350 variable rate.

Part Type

Coilover Adjustable Spring Lowering Kit

Product Overview

QA1's Aluma Matic non-adjustable shock gives you the best ride in rodding without having to worry about valving options. Lightweight Aluminum Body, Non-Adjustable, Coil-Over, 100% Dyno Test and Serialized, Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers, American Made, Precision Machined Aluminum Piston with PTFE Piston Band, 15mm Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System.

Data: v4.2 - Upd: 2026-11-08 20:47:46

Features

  • All mounting hardware included
  • Available with MOD Series, double, single or non-adjustable valving options
  • Excellent DIY solution for drag, street performance & street rodders alike
  • 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 Pro Rear Weld-In Coil-Over System - RideSensitive - 12in x 175/350lbs/in - 3in Tube - Aluminum
Manufacturer Part Number:ALN4000K
Part Number:qapALN4000K
Title:QA1 Shock Absorber and Coil Spring Assembly ALN4000K
UPC:806990000811

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 16:00:48

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Qa1
StreetFX SKU qapALN4000K
SFX Item ID 4092879
Accounting SKU qap-ALN4000K
Manufacturer SKU ALN4000K
Manufacturer UPC 806990000811
Alternative References ALN4000K, QA1-ALN4000K

Coilover Kits, Rear Pro Conversion System, Non-Adjustable, Aluminum, Clear Anodized Shocks, Silver Powdercoated Springs, 175-350 lbs./in. Rate, Kit

Here's an easy way to convert your stock rear suspension to a coilover suspension. You get everything you need with these QA1 Rear Pro coilover systems, from shocks to nuts and bolts, complete installation instructions, and even decals!

Product Attributes
BrandQA1
Manufacturer's Part NumberALN4000K
Part TypeCoilover Kits
Product LineQA1 Rear Pro Coilover Conversion Systems
UPC806990000811
Coilover Kit PositionRear
Adjustable ValvingNo
Shocks IncludedYes
Internal DesignTwin-tube
Coilover Springs IncludedYes
Spring Rate (lbs./in.)175-350 lbs./in.
Suspension Height Adjustment0.0-1.5 in. lowered
Recommended Rear-End Weight1,551-1,850 lbs.
Gas ChargedNo
Extended Length (in.)16.38
Collapsed Length (in.)11.13
Upper MountEyelet
Lower MountEyelet
Body Diameter (in.)2.000
Shock Body MaterialAluminum
Shock Body FinishSilver
Bushing MaterialPolyurethane
Bushing ColorBlack
Spring FinishGray/Silver
Crossmember IncludedNo
Adjustable Mounting Bracket IncludedYes
Hardware IncludedYes
Welding RequiredYes
QuantitySold as a kit.
NotesFor use with 3.000 in. diameter axles. Coilover shocks are non-adjustable Aluma Matic ALN5855P shocks. Springs are 12 in. variable rate 12HT175/350 springs. Includes a 1.625 in. O.D. x 0.095 in. wall x 40.000 in. long weld-in tube.

Manufacturer Attributes
Title QA1 Shock Absorber and Coil Spring Assembly ALN4000K
Brand QA1
Manufacturer Part Number ALN4000K
UPC 806990000811
Manufacturer Designation Kit Pro C-O Conversion Sys 2 Aluma (5) - 12-175/350
Product Class Suspension Shock Absorber and Coil Spring Assembly
Construction/Type Aluma Matic Pro Rear System. Includes 2 shocks, 2 springs and all mounting hardware. Springs are 175/350 variable rate.
Product Outline Excellent DIY solution for drag, street performance & street rodders alike
Available with MOD Series, double, single or non-adjustable valving options
All mounting hardware included
Made in the USA
Vehicle Brief QA1 Conversion Kit
Market Description QA1's Aluma Matic non-adjustable shock gives you the best ride in rodding without having to worry about valving options. Lightweight Aluminum Body, Non-Adjustable, Coil-Over, 100% Dyno Test and Serialized, Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers, American Made, Precision Machined Aluminum Piston with PTFE Piston Band, 15mm Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System.

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