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    Sale!New!

    QA1 Silverado 1500 Sierra 1500 Pro Front Coil-Over System Single Adjustable 10in 650 lb/in Aluminum | 1999-2006 Silverado 1500 & Sierra 1500 | GS517-10650C

    Vendor: QA1
    Part Number: GS517-10650C
    Save $85.19
    $789.95 $875.14

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    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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    Product DetailsFAQReviewsRelated Products

    This QA1 Pro Coil front system upgrades the 1999-2006 Silverado and Sierra 1500 with fully adjustable ride height and valving control. The fully threaded billet aluminum shock body sets ride height for the desired stance and helps fine-tune weight balance, while the single adjustable valving tunes the ride. QA1's American-made lightweight high travel springs use fewer coils and a smaller wire diameter for increased travel, reduced unsprung weight and faster response. It works with factory or upgraded QA1 tubular control arms, bolts in and is made in the USA.

    Specifications:

    • Type: front coil-over system (Pro Coil)
    • Adjustability: single adjustable valving
    • Spring: 10in high travel spring, 650 lb/in rate
    • Shock body: lightweight billet aluminum, fully threaded
    • Ride height adjustable
    • Works with factory or QA1 tubular control arms
    • 100% dyno tested and serialized
    • Bolt-in installation
    • Made in the USA
    • Sold in pairs
    • Part number: GS517-10650C

    Vehicle Applications:

    • 1999 Chevrolet Silverado 1500
    • 2000 Chevrolet Silverado 1500
    • 2001 Chevrolet Silverado 1500
    • 2002 Chevrolet Silverado 1500
    • 2003 Chevrolet Silverado 1500
    • 2004 Chevrolet Silverado 1500
    • 2005 Chevrolet Silverado 1500
    • 2006 Chevrolet Silverado 1500
    • 1999 GMC Sierra 1500
    • 2000 GMC Sierra 1500
    • 2001 GMC Sierra 1500
    • 2002 GMC Sierra 1500
    • 2003 GMC Sierra 1500
    • 2004 GMC Sierra 1500
    • 2005 GMC Sierra 1500
    • 2006 GMC Sierra 1500

    Installation Instructions

    FAQ

    Is this coil-over system adjustable?

    Yes. It uses QA1 single adjustable coil-over shocks with ride height adjustment through the fully threaded aluminum shock body, plus valving adjustment to tune the ride for street, autocross, road racing or drag use.

    What spring is included?

    The system is built around a 10in high travel spring with a 650 lb/in rate. The lightweight high travel spring design uses fewer coils and a smaller wire diameter for increased travel and reduced unsprung weight.

    Is it sold as a pair?

    Yes. The QA1 Pro Coil front system is sold in pairs and installs as a bolt-in upgrade.

    Where is it made?

    QA1 coil-over shocks are made in the USA, and every shock is 100% 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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