Product Summary

300 lbs. Spring Rate, Shocks Included, Welding Required

  • The QA1 Level 3 Drag Kit is a high-performance suspension upgrade for Fox Body Mustangs, designed for drag racing with a lightweight tubular K-member, control arms, trailing arms, sway bar, and adjustable coilovers.
  • The tubular K-member is 50% lighter than stock, offering improved geometry and flexibility for different engine mounts, ideal for factory or Coyote engines.
  • Inverted front struts and MOD Series rear coilovers enhance suspension performance, improving weight transfer and allowing for up to 2" lower ride height.
  • Precision-tuned aluminum caster camber plates and tubular components reduce flex and improve handling for straighter, smoother launches.
  • 300lb/in. Spring for 3.00in. Axle Tube
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Key Specs

MFG. Part #DM501-12300
Spring Rate300 lbs.
Shocks IncludedYes
Shock AdjustabilityDouble Adjustable
Hardware IncludedYes
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QA1 DM501-12300 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. 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. 1 Year Warranty QA1 warrants that the products will be free from defects in material and workmanship for one year from date of sale to the original purchaser. 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.

QA1 DM501-12300 Specifications

KEY SPECS
MFG. Part #DM501-12300
BrandQA1
Spring Rate300 lbs.
Shocks IncludedYes
Shock AdjustabilityDouble Adjustable
Hardware IncludedYes
Welding RequiredYes
Crossmember IncludedNo
GENERAL
Sold in QuantityKit
GTIN Code806990169914
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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