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    QA1 Front Pro Coil System Single Adjustable | 2003-2011 Ford Crown Victoria | MS431-09550

    Vendor: QA1
    Part Number: MS431-09550
    Regular Price $925.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    QA1's Front Pro Coil System for the Ford Crown Victoria delivers fully adjustable ride height and valving control. The single adjustable shock uses a fully threaded body that sets the ride height for the desired stance and helps fine tune weight balance for improved handling. The kit includes a 9 inch 550 lb spring with a flat end.

    Specifications:

    • Type: front Pro Coil coil-over system
    • Adjustment: single adjustable
    • Spring: 9 in, 550 lb rate
    • Spring end: flat
    • Mounting: stock mount, bolt-in
    • Part number: MS431-09550

    Vehicle Applications:

    • 2003 Ford Crown Victoria
    • 2004 Ford Crown Victoria
    • 2005 Ford Crown Victoria
    • 2006 Ford Crown Victoria
    • 2007 Ford Crown Victoria
    • 2008 Ford Crown Victoria
    • 2009 Ford Crown Victoria
    • 2010 Ford Crown Victoria
    • 2011 Ford Crown Victoria

    FAQ

    What vehicles does this QA1 Pro Coil system fit?

    It is designed for 2003-2011 Ford Crown Victoria applications listed in the vehicle applications section of this listing.

    Is this coil-over system adjustable?

    Yes. It uses single adjustable valving and a fully threaded shock body for ride height adjustment.

    What spring is included?

    This kit includes a 9 in, 550 lb rate spring with a flat end.

    Is it sold individually or in pairs?

    QA1 Pro Coil systems are sold in pairs and include all mounting hardware.

    Where is it made?

    QA1 Pro Coil systems are made in the USA, 100 percent dyno tested and serialized.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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