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Qa1

QA1 Rear Suspension Conversion Systems for 1999-2006 SIERRA 1500, SILVERADO 1500 - R145-200 System, Adjustable, Single Adjustable Coilover, 200 lbs./in., Torque Arm, Panhard Bar, GM 10-Bolt, Short Bed, Chevy, GMC, Kit

SKU: QAPR145-200

Rear Suspension Packages

Qa1

QA1 Rear Suspension Conversion Systems for 1999-2006 SIERRA 1500, SILVERADO 1500 - R145-200 System, Adjustable, Single Adjustable Coilover, 200 lbs./in., Torque Arm, Panhard Bar, GM 10-Bolt, Short Bed, Chevy, GMC, Kit

SKU: QAPR145-200

Rear Suspension Packages
A$5,636.34
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

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

Coilover Adjustable Spring Lowering Kit

Data: v4.2 - Upd: 2026-10-16 13:07:14

Features

  • Adjustable drop range from 4"–7" lower
  • Big upgrade in traction, ride comfort, and suspension control
  • Designed for easy installation with basic tools
  • Includes bolt-in fuel tank crossmember—no welding needed
  • Made in the USA
  • Panhard bar helps maintain lateral alignment under load
  • Single adjustable coil-overs with 18 clicks of adjustment
  • Spanner wrench and thrust bearing included
  • Torque arm design eliminates bind and improves rear grip
  • Works great with QA1’s rear sway bar (sold separately)

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
R145-200
Product Attributes - Part Type
Rear Suspension Packages
Product Attributes - Product Line
QA1 Rear Suspension Conversion Systems
Product Attributes - UPC
806990233653
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)
200 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
Yes
Product Attributes - Adjustable Panhard Bar Included
Yes
Product Attributes - Adjustable Panhard Bar Type
On car adjustable
Product Attributes - Upper Trailing Arms Included
No
Product Attributes - Adjustable Upper Trailing Arms Included
Yes
Product Attributes - Adjustable Upper Trailing Arms Type
On car adjustable
Product Attributes - Lower Trailing Arms Included
No
Product Attributes - Adjustable Lower Trailing Arms Included
Yes
Product Attributes - Adjustable Lower Trailing Arms Type
On car 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
For use with 10-bolt axle and short bed models only. Modification to exhaust required.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapR145-200
SFX Item ID 6649627
Supplier Item Code 6649627
Manufacturer SKU R145-200
Manufacturer UPC 806990233653
Alternative References QA1R145-200, Qa1, 10-Bolt

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelBASE
    Beginning Year1999
    Ending Year2005
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelHYBRID
    Beginning Year2004
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelLS
    Beginning Year1999
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelLT
    Beginning Year1999
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelSS
    Beginning Year2003
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelWT
    Beginning Year2002
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeCHEVROLET
    ModelSILVERADO 1500
    SubmodelZ71 OFF-ROAD
    Beginning Year2004
    Ending Year2005
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelBASE
    Beginning Year2002
    Ending Year2005
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelC3
    Beginning Year2001
    Ending Year2001
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelDENALI
    Beginning Year2002
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelHT
    Beginning Year2002
    Ending Year2002
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelHYBRID
    Beginning Year2005
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelSL
    Beginning Year1999
    Ending Year2003
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelSL
    Beginning Year2006
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelSLE
    Beginning Year1999
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelSLT
    Beginning Year1999
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.
  • UniversalNo
    MakeGMC
    ModelSIERRA 1500
    SubmodelWT
    Beginning Year2002
    Ending Year2006
    Axle ModelGM 8.6 in.
    Application NotesShort bed models only. Modification to exhaust required.

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