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QA1 GS401-10550C coil-over system full view
QA1 GS401-10550C coil-over system
Single adjustable damping knob close up
Lightweight billet aluminum shock body
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QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat Large - Aluminum

QA1
QAPGS401-10550C
806990062185
Coilovers
Out of stock
$ 830.83 $ 749.95

SKU: GS401-10550C   |   UPC: 806990062185


QA1  GM Pro Front Coil-Over System – Single Adj. 10in x 550lbs/in Flat Large Aluminum

The QA1 GM Pro front coil-over system with single adjustable valving for classic GM applications. Lightweight billet aluminum shocks paired with high travel 550lbs/in springs deliver fully adjustable ride height, precise damping control, superior handling, and race-proven performance the ultimate front suspension upgrade for any muscle car or street/strip build seeking tunability, comfort, and maximum performance.

Key Features

  • Single Adjustable Valving – Tune compression for custom ride feel from street comfort to track performance
  • Lightweight Billet Aluminum Shocks – High strength and reduced unsprung weight for improved response
  • High Travel Springs – 10in length with 550lbs/in rate for increased travel and better suspension dynamics
  • Ride Height Adjustable – Fully threaded body allows precise stance and weight balance tuning
  • Flat Large Base – Optimized for GM applications with stable, secure mounting
Spec Detail
Part Number GS401-10550C
Brand QA1
Type GM Pro Front Coil-Over System
Adjustability Single Adjustable
Spring Rate 550 lbs/in
Spring Length 10 in
Material Billet Aluminum Shocks
Base Flat Large
Country of Origin United States
Warranty QA1 Limited Lifetime

Whats Included

  • Pair of QA1 Single Adjustable Coil-Over Shocks
  • High Travel 550lbs/in Springs
  • Mounting hardware
  • Installation instructions

Product Notes

  • Designed for classic GM muscle car front suspension applications
  • 100% dyno tested and serialized for quality assurance
  • Serviceable and rebuildable by QA1 authorized centers

Installation Notes

  • Easy bolt-in installation
  • Estimated time: 4–6 hours
  • Professional installation and alignment highly recommended

This Part Fits

Year Range Make Model Trim / Engine Notes
Various Chevrolet Classic GM Muscle Cars Front suspension Verify application

Why Choose QA1 GM Pro Coil-Over Systems?

  • #1 choice for adjustable coil-over performance on classic GM vehicles
  • Built & tested in the United States
  • Chosen by muscle car builders and racers for tuning flexibility and durability

Frequently Asked Questions

  • Q: Does this fit my 1969 Chevrolet Camaro?
    A: Yes, designed for classic GM front suspension; verify specific fitment details.
  • Q: How do I adjust the valving?
    A: Single adjustable compression via external knob for custom tuning.
  • Q: What spring rate is best for street use?
    A: 550lbs/in provides good balance; softer rates available for comfort.

Shipping & Handling

  • Method: Ground UPS or FedEx
  • Availability: In stock – ships same or next business day
  • Packaging: Official QA1 retail box

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