MS402-10450C Front Pro Coil Shock System, Single Adjustable, Ford, 10in. Spring, 450lb./in.

MS402-10450C Front Pro Coil Shock System, Single Adjustable, Ford, 10in. Spring, 450lb./in.

QA1

SKU
MS402-10450C
$854.95
Estimated Shipping Date: Jun 25, 2026
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Installation Guide
California Prop 65
Emissions Code 4

Upgrade your 1967–1973 Mustang’s suspension with QA1’s Pro Coil System. This single adjustable coilover kit combines modern handling, ride quality, and stance adjustability in an easy bolt-in package. Featuring 10” coil springs with a 450 lb./in. rate, it’s the firmest single adjustable option available, delivering sharper cornering and reduced body roll for aggressive street performance and restomod builds.

MODERN HANDLING & ADJUSTABILITY

With QA1’s single adjustable coilovers, you can fine-tune rebound and compression together with 18 settings of adjustment. One knob makes it simple to soften the ride for cruising or firm it up for maximum handling response.

RIDE HEIGHT FLEXIBILITY

This system allows you to adjust ride height from factory stock height down to 2” lower, giving you flexibility to fine-tune stance, handling balance, and wheel/tire clearance while maintaining proper geometry.

EASY BOLT-IN INSTALLATION

No cutting or welding required. QA1 designed this kit as a direct bolt-in upgrade for classic Mustangs, making it a DIY-friendly option that delivers modern suspension performance with minimal effort.

FEATURES & BENEFITS

  • Application-specific fit for 1967–1973 Ford Mustangs
  • Single adjustable shocks with 18 settings of rebound/compression control
  • Includes 10” coil springs with a 450 lb./in. spring rate
  • Ride height adjustable: factory to –2”
  • Direct bolt-in installation — no welding required
  • Durable powder-coated springs and premium hardware
  • Works seamlessly with QA1 tubular control arms and sway bars

FITMENT NOTES

  • Fits 1967–1973 Ford Mustangs
  • Ride height adjustable: factory to -2”
  • Includes single adjustable shocks and 10” 450 lb./in. springs
  • Works with factory control arms or QA1 tubular control arms and sway bars
  • 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 Rate450lb/in.
  • Springs IncludedYes
  • Shock ValvingSingle Adjustable
  • Vehicle PositionFront

FREQUENTLY ASKED QUESTIONS (FAQ’s)

What spring rate comes with the QA1 MS402-10450C coilover kit?

This system includes 10” front coil springs with a 450 lb./in. spring rate.

How much ride height adjustment do QA1 Pro Coils provide for a 1967–1970 Mustang?

They allow ride height adjustment from factory stock height down to 2 inches lower, giving you full control over stance and geometry.

How do single adjustable QA1 coilovers work?

Single adjustable shocks use one knob to control rebound and compression together, offering 18 settings to fine-tune ride comfort and performance.

Do QA1 coilover kits require modifications to install?

No. The MS402-10450C kit is a direct bolt-in replacement and installs with basic tools - no welding or cutting required.

Is the 450 lb./in. spring rate too stiff for daily driving?

The 450 lb./in. springs are firmer than the 400 lb./in. option, making them best for aggressive street driving and restomods with small block equipped vehicles, or on the softer side for big block cars.

What other upgrades pair best with QA1 Pro Coils?

For a complete suspension package, pair coilovers with QA1 tubular control arms and sway bars to maximize geometry, handling, and strength. (available for 67-70 Mustangs only)

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