MD401-10350C Front Pro Coil Shock System, Double Adjustable, Ford, 10in. Spring, 350lb./in.

MD401-10350C Front Pro Coil Shock System, Double Adjustable, Ford, 10in. Spring, 350lb./in.

QA1

SKU
MD401-10350C
$1,079.95
Estimated Shipping Date: Jun 10, 2026
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Installation Guide
California Prop 65
Emissions Code 4

Take your classic Mustang’s suspension to the next level with QA1’s Pro Coil System. Engineered specifically for 1964–1966 Mustangs, this double adjustable coilover kit gives you complete control over ride quality, stance, and performance. Featuring 10” coil springs with a 350 lb./in. spring rate, it’s an ideal setup for drivers who want a balance of comfort and handling with full adjustability for any driving situation.

TOTAL SUSPENSION CONTROL

QA1 double adjustable coilovers allow independent adjustment of rebound and compression. With 18 clicks for each, you can precisely tune how your Mustang reacts to bumps, corners, and acceleration. Whether you’re cruising, carving corners, or dialing in track settings, this system gives you unmatched control.

RIDE HEIGHT FLEXIBILITY

Fine-tune your Mustang’s stance with adjustable ride height from factory stock height down to 2” lower. Achieve the aggressive look you want while maintaining proper suspension geometry for predictable handling.

EASY BOLT-IN INSTALLATION

QA1 designed this system as a direct bolt-in replacement. No welding, no cutting - just straightforward installation with standard tools. Perfect for DIY enthusiasts and builders who want modern performance without fabrication.

FEATURES & BENEFITS

  • Application-specific fit for 1964–1966 Ford Mustangs
  • Double adjustable shocks with 18 settings each for rebound and compression
  • Includes 10” coil springs with a 350 lb./in. spring rate
  • Ride height adjustable: factory to –2”
  • Direct bolt-in installation - no welding required
  • Powder-coated springs and premium hardware for durability
  • Complements QA1 control arms and sway bars for a complete suspension solution

FITMENT NOTES

  • Fits 1964–1966 Ford Mustangs
  • Ride height adjustable: factory to –2”
  • Includes double adjustable shocks and 10” 350 lb./in. springs
  • Works with factory control arms or QA1 tubular control arms and sway bars
  • Easy bolt-in installation - no welding required

RECOMMENDED FRONT SPRING RATE CHART

YEAR MODEL SMALL BLOCK SPRINGS BIG BLOCK SPRINGS
1964-1966 Mustang 350 450
1967-1973 Mustang 400 500



Specifications

  • Spring Rate350lb/in.
  • Springs IncludedYes
  • Shock ValvingDouble Adjustable
  • Vehicle PositionFront

FREQUENTLY ASKED QUESTIONS (FAQ’s)

What is the difference between single adjustable and double adjustable QA1 coilovers?

Single adjustable controls rebound and compression together, while double adjustable provides independent control of rebound and compression. This allows more precise tuning for performance driving or track use.

What spring rate comes with the QA1 MD401-10350C coilover kit?

This system includes 10” front coil springs with a 350 lb./in. spring rate, ideal for street performance with balanced comfort.

How much ride height adjustment does this QA1 Pro Coil system provide?

It allows ride height adjustment from factory stock height down to 2 inches lower, giving flexibility for stance and handling.

Do QA1 double adjustable coilovers require welding or modifications?

No. The system is designed for direct bolt-in installation with standard tools.

Is the 350 lb./in. spring rate good for street use?

Yes. The 350 lb./in. spring provides a comfortable ride while improving handling, making it a great choice for street-driven small block equipped Mustangs and mild performance builds.

Can QA1 Pro Coils be used with other suspension upgrades?

Yes. They’re designed to work seamlessly with QA1 tubular control arms, sway bars, and other components for a complete suspension system.

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