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Qa1

QA1 Pro Rear Weld-In Coil-Over System - MOD Series - 12in x 110lbs/in - 3.25in Tube - Aluminum

SKU: QAPDM501-1101

Coilover Kits

QAP Coil-Overs - Weld-In...

Qa1

QA1 Pro Rear Weld-In Coil-Over System - MOD Series - 12in x 110lbs/in - 3.25in Tube - Aluminum

SKU: QAPDM501-1101

Coilover Kits

QAP Coil-Overs - Weld-In...

A$4,298.23
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 - MOD Series - 12in x 110lbs/in - 3.25in Tube - Aluminum

Additional Information

Pro-Rear System that includes two MOD series custom mount coil-over shock kit and two springs with a rate of 110 and all mounting hardware.

Part Type

Coilover Adjustable Spring Lowering Kit

Product Overview

Upgrade your rear end with QA1's Pro-Rear System. Available in the MOD series, double adjustable, single adjustable and ride sensitive valving non-adjustable options,each adjustment has been carefully defined to provide the ideal horse curve to maximize performance. With evenly spaced valving changes throughout the adjustment range, there are no jumps when adjusting between any two clicks. These Pro-Rear Systems are commonly used in drag racing, street performance and street rod applications. Available in Simultaneous Compresion and Rebound Single Adjustable (DS), Independent Compression & Rebound Double Adjustable (DD) or Ride Sensitive Non-Adjustable (ALN), 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, Precision Machined Aluminum Piston with PTFE Piston Band, 5/8" Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System, Available to Fit 3" or 3.25" Diameter Axle Tubes, Made in the USA, , Kit includes:, (2) Proma Star Shocks or Aluma Matic Shocks, (2) Linear or Variable Rate Springs, All Mounting Hardware.


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 11:55:30

Data: v4.2 - Upd: 2026-11-08 12:24:45

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 - MOD Series - 12in x 110lbs/in - 3.25in Tube - Aluminum
Manufacturer Part Number:DM501-1101
Part Number:qapDM501-1101
Title:QA1 Shock Absorber and Coil Spring Assembly DM501-1101
UPC:806990159465

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Qa1
StreetFX SKU qapDM501-1101
SFX Item ID 4093368
Accounting SKU qap-DM501-1101
Manufacturer SKU DM501-1101
Manufacturer UPC 806990159465
Alternative References DM501-1101, QA1-DM501-1101

Coilover Kits, Rear Pro Conversion System, MOD Double-Adjustable, Aluminum, Clear Anodized Shocks, Silver Powdercoated Springs, 110 lbs./in. Rate, Kit

QA1 MOD Series conversion systems enable you to fabricate your own custom-mount weld-in rear coilover suspension system in any non-leaf spring vehicle. The kits are available for different rear-end vehicle weight—in adjustable ranges from 1,050 to 1,700 lbs.—as well as for 3 in. or 3.25 in. axle diameters. Order the model designed to fit your application.

Pro coil systems include:
• (2) Coilover shocks
• (2) Linear rate springs
• 1.625 in. O.D. x .095 in. wall x 40 in. long weld-in tube
• All mounting hardware

Product Attributes
BrandQA1
Manufacturer's Part NumberDM501-1101
Part TypeCoilover Kits
Product LineQA1 Rear MOD Series Pro Coilover Conversion Systems
UPC806990159465
Coilover Kit PositionRear
Adjustable ValvingYes
Number of Valving Selections576
Shocks IncludedYes
Internal DesignTwin-tube
Coilover Springs IncludedYes
Spring Rate (lbs/in.)110 lbs./in.
Suspension Height Adjustment0.0-1.5 in. lowered
Recommended Rear-End Weight1,050-1,300 lbs.
Gas ChargedYes
Extended Length (in.)16.88
Collapsed Length (in.)11.50
Upper MountBearing
Lower MountBearing
Shock Body MaterialAluminum
Shock Body FinishSilver
Bushing MaterialSpherical bearing
Bushing ColorNatural
Spring FinishGray/Silver
Crossmember IncludedNo
Adjustable Mounting Bracket IncludedYes
Hardware IncludedYes
Welding RequiredYes
QuantitySold as a kit.
NotesFor use with 3.250 in. diameter axles. Coilover shocks are double adjustable Mod Series shocks. Springs are 12 in. linear rate 12HT110 springs. Includes a 1.625 in. O.D. x 0.095 in. wall x 40.000 in. long weld-in tube.

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