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Qa1

QA1 Rear Suspension Conversion Systems for 1973-1979 F-100, 1975-1979 F-150 - R121-250 Coilover System, Single Adjustable, 250 lbs./in. Spring Rate, Ford, Kit

SKU: QAPR121-250

Rear Suspension Packages

Qa1

QA1 Rear Suspension Conversion Systems for 1973-1979 F-100, 1975-1979 F-150 - R121-250 Coilover System, Single Adjustable, 250 lbs./in. Spring Rate, Ford, Kit

SKU: QAPR121-250

Rear Suspension Packages
A$7,673.83
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 rear suspension conversion systems provide easy, bolt-in options to replace your coil springs on factory truck arms—without any cutting, welding, or other fabricating. Each kit contains frame brackets, axle brackets, linkage assemblies, a crossmember assembly, and necessary hardware. The conversions are available with coilovers or available for use with the factory springs. Order the model designed for fitment on your specific vehicle, and enjoy the stance, handling, and suspension performance of a revolutionary QA1 system.

Part Type

Rear Suspension Packages

Data: v4.2 - Upd: 2026-10-03 00:50:50

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
R121-250
Product Attributes - Part Type
Rear Suspension Packages
Product Attributes - Product Line
QA1 Rear Suspension Conversion Systems
Product Attributes - UPC
806990168931
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 twin-tube coilover
Product Attributes - Coilover Springs Included
Yes
Product Attributes - Coilover Spring Rate (lbs/in)
250 lbs./in.
Product Attributes - Spring Finish
Gray/Silver
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
Yes
Product Attributes - Panhard Bar Included
Yes
Product Attributes - Adjustable Panhard Bar Included
Yes
Product Attributes - Adjustable Panhard Bar Type
Single adjustable
Product Attributes - Upper Trailing Arms Included
No
Product Attributes - Adjustable Upper Trailing Arms Included
No
Product Attributes - Lower Trailing Arms Included
Yes
Product Attributes - Adjustable Lower Trailing Arms Included
Yes
Product Attributes - Adjustable Lower Trailing Arms Type
Double 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
Fits short wheelbase applications.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapR121-250
SFX Item ID 4785901
Supplier Item Code 4785901
Manufacturer SKU R121-250
Manufacturer UPC 806990168931
Alternative References QA1-R121-250, Qa1, F-100, F-150

Compatibility

Application Data
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelBASE
    Beginning Year1973
    Ending Year1978
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelNORTHLAND
    Beginning Year1975
    Ending Year1978
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelRANGER
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelRANGER LARIAT
    Beginning Year1978
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelRANGER XLT
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-100
    SubmodelXLT
    Beginning Year1977
    Ending Year1977
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelBASE
    Beginning Year1976
    Ending Year1978
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelNORTHLAND
    Beginning Year1975
    Ending Year1978
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelRANGER
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelRANGER LARIAT
    Beginning Year1978
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelRANGER XLT
    Beginning Year1975
    Ending Year1979
  • UniversalNo
    MakeFORD
    ModelF-150
    SubmodelXLT
    Beginning Year1977
    Ending Year1977

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