What does 'single adjustable' mean?

Single adjustable coil-overs let you adjust both compression and rebound damping with one knob. Both are changed proportionally, so it's simple to dial in the feel you want without needing separate adjustments.

What spring rate should I choose?

The best spring rate depends on your driving style and vehicle setup. A stiffer spring rate (higher lbs/in number) will reduce body roll and improve responsiveness, while a softer spring rate will provide a more comfortable ride. Consider how you use the car most of the time.

Do these coil-overs come with new mounting hardware?

The manufacturer does not specify whether new mounting hardware is included. Refer to the manufacturer's installation instructions for a complete list of included components and any additional hardware that may be required.

QA1 03-11 Ford Crown Victoria Pro Front Coil-Over System - Single Adj. - 9in x 650lbs/in - Aluminum

Specifications

Brand: QA1
Part #: MS431-09650
UPC: 806990159922

QA1 03-11 Ford Crown Victoria Pro Front Coil-Over System - Single Adj. - 9in x 650lbs/in - Aluminum

Name: QA1 03-11 Ford Crown Victoria Pro Front Coil-Over System - Single Adj. - 9in x 650lbs/in - Aluminum
Brand: QA1
Price: 961.08 USD
Availability: InStock

$961.08

Only 1 left in stock

Adjustable ride height and valving for your 2003-2011 Crown Vic. Fine-tune the stance and handling.

Key Features

Adjustable ride height — get the perfect stance
Adjustable valving — dial in the ride
Aluminum construction — lightweight and strong

⚠️ 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 Crown Victoria 2003-2011

Product Details

QA1 Pro Coil Systems for 2003-2011 Crown Victorias are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling.