MS402-10400C Front Pro Coil Shock System, Single Adjustable, Ford, 10in. Spring, 400lb./in.

MS402-10400C Front Pro Coil Shock System, Single Adjustable, Ford, 10in. Spring, 400lb./in.

QA1

SKU
MS402-10400C
$854.95
Estimated Shipping Date: Jun 12, 2026
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Installation Guide
California Prop 65
Emissions Code 4

Modernize your 1967–1973 Mustang’s suspension with QA1’s Pro Coil System. This single adjustable coilover kit combines ride quality, performance handling, and stance adjustability in an easy bolt-in package. Featuring a 10” coil spring with a 400 lb./in. rate, it’s the perfect solution for street performance and restomod builds that demand sharper handling with a comfortable ride.

MODERN HANDLING & ADJUSTABILITY

QA1 single adjustable coilovers allow you to fine-tune rebound and compression together with 18 settings of adjustment. With a simple turn of the knob, you can soften the ride for cruising or firm it up for aggressive driving.

RIDE HEIGHT FLEXIBILITY

This system lets you adjust ride height from factory stock height down to 2” lower, giving you control over stance, wheel/tire fitment, and handling balance without sacrificing suspension geometry.

EASY BOLT-IN INSTALLATION

No welding, cutting, or major modifications. QA1 designed this kit as a direct bolt-in upgrade for classic Mustangs, making it an easy DIY-friendly installation.

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 400 lb./in. spring rate
  • Adjustable ride height: factory to –2”
  • Easy bolt-in installation - no welding required
  • Durable powder-coated springs and premium hardware
  • Complements QA1 tubular control arms and sway bars for a complete suspension solution

FITMENT NOTES

  • Fits 1967–1973 Ford Mustangs
  • Ride height adjustable: factory to –2”
  • Includes single adjustable shocks and 10” 400 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 Rate400lb/in.
  • Springs IncludedYes
  • Shock ValvingSingle Adjustable
  • Vehicle PositionFront

FREQUENTLY ASKED QUESTIONS (FAQ’s)

What spring rate comes with the QA1 MS402-10400C coilover kit?

This system includes 10” front coil springs with a 400 lb./in. spring rate, a balanced option for sharper handling and comfortable street performance.

How much ride height adjustment do QA1 Pro Coils provide on 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 handling.

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 comfort and performance.

Do QA1 coilover kits require modifications to install?

No. This kit is designed as a direct bolt-in replacement and installs easily with basic tools.

Is the 400 lb./in. spring rate good for daily driving?

Yes. The 400 lb./in. spring is a great all-around spring rate for small block equipped vehicles.

What other suspension upgrades pair well with QA1 Pro Coils?

For best results, combine coilovers with QA1 tubular control arms and sway bars to further improve geometry, strength, and cornering ability. (available for 67-70 Mustangs only)

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