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Qa1

QA1 Chrysler 8-3/4in. & Ford 9in. Axle Housings 70-74 Mopar E-Body - Rear Suspension

SKU: QAPR155-175

Rear Suspension Packages

QAP Susp. Conversion System...

Qa1

QA1 Chrysler 8-3/4in. & Ford 9in. Axle Housings 70-74 Mopar E-Body - Rear Suspension

SKU: QAPR155-175

Rear Suspension Packages

QAP Susp. Conversion System...

A$4,952.18
LOW STOCK! Est Ship 3-5 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Upgrade your classic Mopar A, B or E body car to a triangulated four-link design with QA1's Mopar rear coilover conversion systems. These QA1 conversion systems will transform the way your classic Mopar launches, handles, and cruises down the road! The great-looking powdercoated components improve performance and save weight—plus, you'll enjoy a much more modern driving feel and improved handling in any setting. Order QA1's Mopar rear coilover conversion system for your application.

Additional features:

* Proven triangulated 4-link design is popular with street/strip machines, pro-touring/road racers and autocross drivers
* Available for Mopar 8 3/4 in., Ford 9 in. and Dana 60 rear axles
* Improved traction during launch
* Easy installation that requires minimal welding
* Supports both standard and inboard spring locations
* Gain greater anti-squat and pinion angle adjustability
* Correct your wheelbase to fit larger wheels and tires
* Has clearance for 3 in. over the axle exhaust
* Single- and double-adjustable shocks eligible for limited lifetime warranty by the manufacturer
* You can add the optional rear sway bar to further reduce body roll during hard launches and cornering
* Made in the USA

Product Overview

Convert your classic Dodge Challenger and Plymouth Barracuda from leaf spring rear suspension to a QA1 coil-over kit that uses a triangulated 4 link design. This is the best way to gain a more planted feel, make room for larger wheels and tires and correct the wheelbase of classic Mopars. The kit allows you to run a 3" bumper exit exhaust. This modern design instantly delivers a more modern driving experience on the street while giving you the adjustability to maximize performance at the autocross, road course and drag strip. QA1 Mopar rear suspension systems come complete with powder-coated tubular components-including the cross member, upper trailing arms and lower trailing arms-and all installation necessary hardware. Kits work with popular rear axles including Mopar 8 3/4", Ford 9" and Dana 60 rear ends. Choose the appropriate part number when selecting your kit. Each system includes your choice of single-adjustable, double-adjustable or MOD Series shocks. All of the coil-over options give you the ability to fine tune ride and handling characteristics. You can also easily adjust the ride height to achieve the look and performance you want. QA1 coil-over rear suspension systems can be paired with an optional QA1 sway bar to further enhance handling characteristics and prevent body roll during hard launches. QA1 systems are made in the USA. Single- and double-adjustable shocks are eligible for an industry-leading Limited Lifetime Warranty. Fitment notes: Installation requires a small amount of cutting and welding on the frame and axle housing. This kit works with factory-located leaf spring mounts or modified inboard-located leaf spring mounts. Single-adjustable shocks are recommended for cars used primarily on the street. Double-adjustable coil-overs are recommended for cars that will consistently be used for drag racing, autocross or road racing. MOD Series shocks are recommended for drivers who want maximum performance out of their vehicle.


Features and Benefits

  • QA1 uniquely engineered to enhance the performance of your vehicle
  • Ride height adjustability
  • Adjustable shock valving options for all driving styles
  • Easy bolt-in install
  • Best-in-class warranty
  • Made in the USA

Product Details

Brand:QA1
Description:QA1 Chrysler 8-3/4in. & Ford 9in. Axle Housings 70-74 Mopar E-Body - Rear Suspension
Manufacturer Part Number:R155-175
Part Number:qapR155-175
Prop 65 - Short Label:WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:Yes
Title:QA1 Coilover Overhaul Kit R155-175
UPC:806990163134

Part Type

Coilover Adjustable Spring Lowering Kit

Data: v4.2 - Upd: 2026-10-14 14:41:24

Features

  • Adjustable shock valving options for all driving styles
  • Best-in-class warranty
  • Easy bolt-in install
  • Made in the USA
  • QA1 uniquely engineered to enhance the performance of your vehicle
  • Ride height adjustability

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
R155-175
Product Attributes - Part Type
Rear Suspension Packages
Product Attributes - Product Line
QA1 Mopar Rear Coilover Conversion Systems
Product Attributes - UPC
806990163134
Product Attributes - Third Member Included
No
Product Attributes - Axle Shafts Included
No
Product Attributes - Upper Control Arms Included
No
Product Attributes - Lower Control Arms Included
No
Product Attributes - Air Bags Included
No
Product Attributes - Rear Shocks/Struts Included
Yes
Product Attributes - Rear Shock Type
Single adjustable coilover
Product Attributes - Coilover Springs Included
Yes
Product Attributes - Coilover Spring Rate (lbs/in)
175 lbs./in.
Product Attributes - Spring Finish
Black
Product Attributes - Suspension Package Finish
Black powdercoated
Product Attributes - Bushings Included
Yes
Product Attributes - Bushing Material
Spherical bearing
Product Attributes - Sway Bar Included
No
Product Attributes - Watts Link Included
No
Product Attributes - Panhard Bar Included
No
Product Attributes - Adjustable Panhard Bar Included
No
Product Attributes - Upper Trailing Arms Included
Yes
Product Attributes - Adjustable Upper Trailing Arms Included
Yes
Product Attributes - Adjustable Upper Trailing Arms Type
Double adjustable
Product Attributes - Lower Trailing Arms Included
Yes
Product Attributes - Adjustable Lower Trailing Arms Included
Yes
Product Attributes - Adjustable Lower Trailing Arms Type
Single adjustable
Product Attributes - Trailing Arm Mount Braces Included
Yes
Product Attributes - Trailing Arm Hardware Included
Yes
Product Attributes - Rotors Included
No
Product Attributes - Calipers Included
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Kit for use with Mopar 8 3/4 and Ford 9 in. rear differentials.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapR155-175
SFX Item ID 4096240
Supplier Item Code 4096240
Manufacturer SKU R155-175
Manufacturer UPC 806990163134
Alternative References qa1, QA1-R155-175, 8-3/4in., 9in.

Compatibility

Application Data
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelGRAN COUPE
    Beginning Year1971
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelGRAN COUPE
    Beginning Year1971
    Ending Year1971
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelR/T
    Beginning Year1970
    Ending Year1974
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelR/T
    Beginning Year1970
    Ending Year1970
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelR/T
    Beginning Year1970
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelRALLYE
    Beginning Year1971
    Ending Year1971
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelRALLYE
    Beginning Year1972
    Ending Year1972
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelCUDA
    SubmodelRALLYE
    Beginning Year1972
    Ending Year1972
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelCUDA
    SubmodelRALLYE
    Beginning Year1972
    Ending Year1972
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelCUDA
    SubmodelRALLYE
    Beginning Year1972
    Ending Year1972
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelCUDA
    SubmodelT/A
    Beginning Year1971
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1972
    Ending Year1971
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1970
    Ending Year1972
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1970
    Ending Year1972
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1970
    Ending Year1973
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1970
    Ending Year1974
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1971
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakePLYMOUTH
    ModelBARRACUDA
    SubmodelBASE
    Beginning Year1971
    Ending Year1972
    Axle ModelFord 9 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelBASE
    Beginning Year1971
    Ending Year1974
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1970
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1970
    Ending Year1972
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1970
    Ending Year1972
    Axle ModelFord 9 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1970
    Ending Year1971
    Axle ModelChrysler 8.75 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1970
    Ending Year1971
    Axle ModelFord 9 in.
  • UniversalNo
    MakeDODGE
    ModelCHALLENGER
    SubmodelGRAN COUPE
    Beginning Year1971
    Ending Year1971
    Axle ModelChrysler 8.75 in.

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