Product Summary

Rear Position, 300 lbs. Spring Rate, Height Adjustable

  • QA1's Heavy Duty Pro Rear Systems provide a seamless coilover conversion for vehicles with a 1700-2600 lbs. rear axle weight, including all necessary hardware and bracketry.
  • The system offers 9” of ride height adjustability with axle-mounted brackets allowing for ¾” increments and fine-tuning via the coilover shocks.
  • Single-adjustable Proma Star shocks deliver adjustable ride quality, letting users easily switch between comfort and performance settings.
  • The kit is designed for easy weld-in installation, including all essential brackets and hardware for a straightforward process.
  • 300lb/in. Spring for 3.00in. Axle Tube
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Key Specs

PositionRear
Spring Rate300 lbs.
Shock AdjustabilityDouble Adjustable
Shock TypeTwin Tube
Shock Body MaterialAluminum
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QA1 DS501-12300 Details

Product Overview QA1's Heavy Duty Pro Rear Systems are the perfect solution to add coilovers to your car or truck. Designed for any vehicle with a 1700-2600 lbs. rear axle weight, this kit includes all the necessary hardware and bracketry for a seamless installation. With double shear bracketry and increased spring rates, it ensures the strength and support you need for street and race applications. This simple weld-on kit features axle mount bracketry, upper shock mounts and tubing, and fully adjustable QA1 coilover shocks and springs. Ride Height Adjustability Our axle-mounted brackets offer ¾” increments of adjustment, and the coilover shock allows for fine-tuning. Combined, you will have a total of 9” of ride height adjustability, giving you full control for your desired stance. Single-Adjustable Coil-Overs QA1 single adjustable Proma Star shocks deliver exceptional ride quality and performance. With the simple turn of a dial, you can effortlessly switch between a comfortable cruise and a more aggressive feel, making them ideal for daily driving or twisty backroads. Easy, Weld-In Installation Each kit comes complete with the essential brackets, tabs, and hardware, making it a simple weld-on solution to get the job done efficiently without excess fabrication or trips to the parts store. Best In-Class Lifetime Warranty Register at QA1.net/warranty for lifetime coverage of your QA1 shocks. Made in the USA QA1’s Heavy Duty Pro-Rear Systems is proudly made in Lakeville, Minnesota. Fitment Notes Welding required Designed for 3.00” axle tubes Included tubular upper shock mount dimensions are 1-5/8” diameter x .095 wall, 40” long Requires use of QA1 spanner wrench T114W or T115W

QA1 DS501-12300 Specifications

KEY SPECS
MFG. Part #DS501-12300
BrandQA1
PositionRear
Spring Rate300 lbs.
Shock AdjustabilityDouble Adjustable
Shock TypeTwin Tube
Shock Body MaterialAluminum
Upper Shock MountEyelet
Lower Shock MountEyelet
Height AdjustableYes
FinishPolished
GENERAL
Compressed Length11.63"
Extended Length16.88"
Number of Valving Selections18
Coilover Springs IncludedYes
Sold in QuantityKit
Hardware IncludedYes
Crossmember IncludedNo
Welding RequiredYes
Gas ChargedNo
Spring FinishPowder Coated
NotesDesigned for 3.00 axle tubes. Included tubular upper shock mount dimensions are 1-5/8 diameter x .095 wall, 40 long. Requires use of QA1 spanner wrench T114W or T115W.
GTIN Code806990169990
Adjustable ValvingYes
Adjustable Mounting Bracket IncludedYes
Lower MountBearing
Upper MountBearing
Shocks IncludedYes

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