QA1 · New
QA1 HD Pro Rear Weld-In Coilover Kit 300lb/in. S-Adj. 3.25in
MPN DS501-3001 · Store SKU qapDS501-3001
Supplier stock checked 11/7/2026, 6:00:02 AM UTC. Adding a part does not reserve it.
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Product 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 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. QA1's Heavy Duty Pro-Rear Systems is Fitment Notes Welding required Designed for 3.25 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 HD Pro Rear System includes two single adjustable coilover shocks, two springs, 40" long weld-in tube, and all mounting hardware. QA1 DS501-3001 HD Pro Rear Coilover Conversion System, 3.25" Axle, Single, 300lb
Manufacturer fitment & guides
Check DS501-3001 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
