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Durable Qa1 Pro Rear Weld-in Coil-over System - Mod Series - 12in X 110lbs/in - 3.25in Tube - Aluminum Tool [7osWl5iL]

$114.99 $367.99 -69%

QA1 Pro Rear Weld-In Coil-Over System - MOD SeriesUpgrade your vehicle's rear suspension with the QA1 Pro Rear Weld-In Coil-Over System, part of the MOD Series. This high-performance system is designed to enhance the handling and stability of your ve

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QA1 Pro Rear Weld-In Coil-Over System - MOD Series

Upgrade your vehicle's rear suspension with the QA1 Pro Rear Weld-In Coil-Over System, part of the MOD Series. This high-performance system is designed to enhance the handling and stability of your vehicle, making it an ideal choice for drag racing, street performance, and street rod applications. With its double adjustable, single adjustable, and ride sensitive valving non-adjustable options, the QA1 Pro Rear System offers a wide range of adjustments to suit your specific needs. Each adjustment is carefully defined to provide the ideal horse curve, maximizing performance and ensuring a smooth ride.
  • Double Adjustable – Fine-tune your vehicle's performance with precise adjustments.
  • Single Adjustable – Simple yet effective adjustments for those who prefer a straightforward setup.
  • Ride Sensitive Valving – Non-adjustable option for a balanced and comfortable ride.

Technical Specifications and Benefits

The QA1 Pro Rear Weld-In Coil-Over System is built to last with premium components. Crafted from lightweight aluminum, this system is not only durable but also helps reduce overall vehicle weight. It features a 5/8" centerless ground, hard chrome plated solid piston rod, and a three-step sealing system for extended lifespan and reliability. Each system is 100% dyno tested and serialized for quality assurance. The kit includes (2) Proma Star Shocks or Aluma Matic Shocks, (2) Linear or Variable Rate Springs, and all necessary mounting hardware.
  • Lightweight Aluminum Construction – Enhances vehicle performance and handling.
  • 100% Dyno Tested – Ensures optimal performance and reliability.
  • Revalveable and Rebuildable – Long-lasting investment with the ability to adapt to changing needs.

Practical Applications and Target Audience

Whether you're a drag racer, a street performance enthusiast, or a custom car builder, the QA1 Pro Rear Weld-In Coil-Over System is the perfect solution for your vehicle. Its versatile design and high-performance capabilities make it a favorite among automotive enthusiasts. With the ability to fit 3" or 3.25" diameter axle tubes, this system is adaptable to a wide range of vehicles. By upgrading to the QA1 Pro Rear System, you'll experience improved handling, increased stability, and a more dynamic driving experience.
  • Drag Racing – Boost your vehicle's performance on the track.
  • Street Performance – Enhance your daily driving experience.
  • Street Rod Applications – Customize your vehicle with top-of-the-line suspension technology.

What Our Customers Say

December 30, 2025

Absolutely no complaints!

I am so very, very, very, very happy with this.

- Guto Y..

December 30, 2025

Absolutely no complaints!

A very positive experience from A to B to Z.

- Vincent Y..

December 30, 2025

Absolutely no complaints!

I'm happy with this. A very, very big thank you.

- Eirwen C..

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