MD402-10500C Front Pro Coil Shock System, Double Adjustable, Ford, 10in. Spring, 500lb./in.

MD402-10500C Front Pro Coil Shock System, Double Adjustable, Ford, 10in. Spring, 500lb./in.

QA1

SKU
MD402-10500C
$1,079.95
Estimated Shipping Date: Jun 17, 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 Front Pro Coil System. Purpose-built for 1967–1973 Mustangs, this kit combines modern adjustability with heavy-duty spring rates to handle the additional weight of ’67-‘73 Mustangs. Featuring 10” coil springs with a 500 lb./in. rate, it’s the ideal solution for drivers who demand sharper handling, firmer ride control, and the durability to manage higher horsepower and cornering loads.

FULLY TUNABLE WITH DOUBLE ADJUSTABILITY

QA1’s double adjustable shocks give you independent control of rebound and compression, each with 18 clicks of adjustment. This lets you fine-tune suspension behavior for daily comfort, aggressive street driving, or even track use - dialing in the perfect balance of ride and performance.

SPRINGS OPTIMIZED FOR ’67–’73 MODELS

The included 500 lb./in. springs are tailored specifically for the added front-end weight of 1967–1973 Mustangs with big block engines. They deliver firmer control while maintaining drivability, ensuring your Mustang feels planted and predictable at all times.

RIDE HEIGHT FLEXIBILITY

Easily adjust ride height from factory stock height down to 2” lower. Whether you prefer a stock appearance or a lowered stance, QA1 coilovers let you fine-tune your setup without compromising geometry or handling.

BOLT-IN INSTALLATION

Built as a true bolt-in system, QA1 Pro Coils require no welding or cutting. With powder-coated springs, premium hardware, and straightforward installation, you’ll be back on the road quickly with a suspension that’s built to last.

FEATURES & BENEFITS

  • Application-specific fit for 1967–1973 Ford Mustangs
  • Double adjustable shocks: 18 rebound & 18 compression settings
  • Includes 10” coil springs with a 500 lb./in. spring rate, tuned for heavier ’67–’73 models
  • Ride height adjustable: factory to –2”
  • Bolt-in installation - no welding required
  • Durable powder-coated springs and premium hardware
  • Compatible with QA1 tubular control arms and sway bars (available for 67-70 Mustangs only)

FITMENT NOTES

  • Fits 1967–1973 Ford Mustangs
  • Ride height adjustable: factory to –2”
  • Includes double adjustable shocks and 10” 500 lb./in. springs
  • Works with factory control arms or QA1 tubular control arms and sway bars (available for 67-70 Mustangs only)
  • Bolt-in installation - no welding required
  • Sold as a pair

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 Rate500lb/in.
  • Springs IncludedYes
  • Shock ValvingDouble Adjustable
  • Vehicle PositionFront

FREQUENTLY ASKED QUESTIONS (FAQ’s)

What spring rate comes with the MD402-10500C coilover kit?

The kit includes 10” 500 lb./in. springs, designed for the additional front-end weight of 1967–1970 Mustangs with big block engines.

What’s the advantage of double adjustable shocks?

Double adjustable shocks give you independent rebound and compression control, letting you fine-tune comfort, traction, and cornering balance more precisely than single adjustable shocks.

How much stance adjustability do these coilovers offer?

Ride height is adjustable from factory stock to 2 inches lower, allowing you to set the stance that matches your style and performance goals.

Do I need to weld or cut to install QA1 Pro Coils?

No. These coilover systems are engineered for direct bolt-in installation, requiring only basic tools.

Are 500 lb./in. springs too stiff for street driving?

While firmer than lighter spring options, these springs are specifically tailored for the heavier ’67–’73 Mustangs, providing balanced handling and stability without sacrificing drivability.

What other suspension upgrades should I pair with QA1 coilovers?

For best results, combine Pro Coils with QA1 tubular control arms and sway bars for a complete, balanced suspension system. (available for 67-70 Mustangs only)

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