What is the benefit of having double adjustable shocks?

Double adjustable shocks allow you to independently control the rebound and compression of the shock. This allows fine-tuning of the suspension to suit different driving conditions and preferences. Each shock has 18 clicks of adjustment.

How much can I lower my Mustang with this system?

This QA1 Pro Coil System allows you to adjust the ride height from the factory stock height down to 2 inches lower. This lets you dial in the perfect stance and improve handling balance without affecting geometry. Lowering can also help with wheel and tire clearance.

Is this system difficult to install?

The QA1 Pro Coil System is designed for a direct bolt-in installation, meaning no welding or cutting is required. This makes it a DIY-friendly solution for classic Mustang owners. Refer to the manufacturer's installation instructions for specific procedures and torque specs.

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

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Specifications

Brand: QA1
Part #: MD401-10400C
UPC: 806990158642

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

Name: QA1 64-66 Ford Mustang Pro Front Coil-Over System - Double Adj. - 10in x 400lbs/in - Aluminum
Brand: QA1
Price: 1171.52 USD
Availability: InStock

$1171.52

On Backorder

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

Modern suspension for your classic Mustang. Double-adjustable for full control over ride and handling.

Key Features

Double adjustable shocks — independent rebound and compression control
10” coil springs rated at 400 lb./in. — balances ride comfort and performance
Ride height adjustment — dial in the perfect stance
Aluminum construction — lightweight
Direct 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

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Fits this vehicle

Ford Mustang 1964-1966

Product Details

Bring modern suspension performance to your classic Mustang with QA1’s Pro Coil System. Specifically designed for 1964–1966 Mustangs, this double adjustable coilover kit delivers full control over ride quality, stance, and handling. With 10” coil springs rated at 400 lb./in., this setup strikes the ideal balance between ride comfort and sharper performance for aggressive street driving or entry-level competition builds. FULL CONTROL WITH DOUBLE ADJUSTABILITY QA1’s double adjustable shocks feature independent rebound and compression control with 18 clicks each. This allows you to fine-tune how your Mustang handles bumps, weight transfer, and cornering grip. Whether you’re cruising, carving backroads, or setting up for a track day, this system puts you in complete control. RIDE HEIGHT FLEXIBILITY Easily dial in the perfect stance with ride height adjustment from factory stock height down to 2” lower. Lower your Mustang for an aggressive look, improve handling balance, or fine-tune for wheel and tire clearance without sacrificing geometry. EASY BOLT-IN INSTALLATION No welding, no cutting. The Pro Coil System installs with basic hand tools as a direct bolt-in upgrade, making it an accessible DIY-friendly solution for classic Mustang owners.