What kind of tools are needed for installation?

This QA1 coil-over kit is designed for a straightforward installation using basic hand tools. No welding or cutting is required, making it a suitable upgrade for DIYers.

How much does this coil-over kit lower the ride height?

This system allows you to adjust the ride height from the factory stock height down to 2 inches lower. This lets you achieve the right stance without affecting suspension geometry or drivability.

What is the spring rate of the included coil springs?

The included coil springs have a rate of 400 lbs/in. This rate is a good choice for restomods and street-driven cars that need sharper handling and improved control.

QA1 64-66 Ford Mustang Pro Front Coil-Over System - Single Adj. - 10in x 400lbs/in - Aluminum

1 / 3

Specifications

Brand: QA1
Part #: MS401-10400C
UPC: 806990158499

QA1 64-66 Ford Mustang Pro Front Coil-Over System - Single Adj. - 10in x 400lbs/in - Aluminum

Name: QA1 64-66 Ford Mustang Pro Front Coil-Over System - Single Adj. - 10in x 400lbs/in - Aluminum
Brand: QA1
Price: 927.44 USD
Availability: InStock

$927.44

On Backorder — Expected to ship by Mar 18, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Bolt-in coil-over kit for classic Mustangs. Improves handling and lets you adjust ride height.

Key Features

Single adjustable — adjust rebound and compression together
10" coil spring with a 400 lb./in. rate — good for street-driven cars
Ride height adjustable — adjust from factory stock height down to 2" lower
Bolt-in installation — no welding or cutting required

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Fits this vehicle

Ford Mustang 1964-1966

Product Details

Upgrade your classic Mustang’s suspension with QA1’s Pro Coil System. Engineered for 1964–1966 Mustangs, this single adjustable coilover kit offers modern handling, ride quality, and stance adjustability in a straightforward, bolt-in package. Featuring a 10” coil spring with a 400 lb./in. rate, it’s an excellent choice for restomods and street-driven cars that need sharper handling and improved control. MODERN HANDLING & CONTROL Factory suspension designs limit tuning and performance. QA1’s single adjustable coilovers let you fine-tune rebound and compression together with 18 adjustment settings. With one knob, you can soften the ride for cruising or firm it up for aggressive driving, giving you the flexibility to match your Mustang’s style. RIDE HEIGHT FLEXIBILITY This system allows you to adjust ride height from factory stock height down to 2” lower. Whether you’re keeping an original look or going for a lower stance, QA1 Pro Coils let you achieve the right height without sacrificing suspension geometry or drivability. EASY BOLT-IN INSTALLATION No welding or cutting required. QA1 designed this system as a direct bolt-in replacement that installs with basic hand tools, making it a perfect upgrade for DIY enthusiasts.