Product Summary

250 lbs. Spring Rate, Shocks Included, Welding Required

  • QA1's Heavy Duty Pro Rear Systems provide a complete solution for adding coilovers to vehicles with a rear axle weight of 1700-2600 lbs, featuring all necessary hardware for seamless installation.
  • The kit includes double shear bracketry and increased spring rates, ensuring durability and support for both street and race applications, along with fully adjustable QA1 coilover shocks and springs.
  • It offers 9” of total ride height adjustability through axle-mounted brackets with ¾” increments and coilover shock fine-tuning for personalized stance control.
  • The MOD Series coil-overs include modular valve packs for tunability, allowing for adjustments without removal, and are designed for straightforward weld-in installation with all essential components included.
  • 250lb/in. Spring for 3.00in. Axle Tube
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Key Specs

MFG. Part #DM501-12250
Spring Rate250 lbs.
Shocks IncludedYes
Shock AdjustabilityDouble Adjustable
Hardware IncludedYes
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QA1 DM501-12250 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. MOD Series Coil-Overs Designed for top builds wanting more tunability and aggressive force curves, these shocks feature modular valve packs, allowing valving changes without removing them from the car. With high-speed and low-speed bleed adjustability, these shocks are both streetable and able to get high-horsepower cars down the drag strip. 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. 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 T121W.

Guides & Documents

QA1 DM501-12250 Specifications

KEY SPECS
MFG. Part #DM501-12250
BrandQA1
Spring Rate250 lbs.
Shocks IncludedYes
Shock AdjustabilityDouble Adjustable
Hardware IncludedYes
Welding RequiredYes
Crossmember IncludedNo
GENERAL
Sold in QuantityKit
GTIN Code806990169907
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 T121W.
Shock Body MaterialAluminum
Compressed Length11.5"
Extended Length16.88"
FinishPowder Coated
Adjustable Mounting Bracket IncludedYes
Adjustable ValvingYes
Gas ChargedNo
Lower MountBearing
Number of Valving Selections576
Upper MountBearing
Spring FinishGray/Silver
Coilover Springs IncludedYes

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