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    Sale!New!

    QA1 Corvette Pro Front Coil-Over System Single Adjustable 9in 550 lb/in Pigtail Large Aluminum | 1963-1982 Corvette | GS507-09550D

    Vendor: QA1
    Part Number: GS507-09550D
    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.
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    Product DetailsFAQReviewsRelated Products

    The QA1 GM Pro Coil System is a front coil-over conversion for builders who want 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 for improved handling, while the single adjustable valving dials in 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 installs as a bolt-in upgrade and is used in drag racing, street performance, autocross, road racing and street rod applications.

    Specifications:

    • Type: front coil-over system (Pro Coil)
    • Adjustability: single adjustable valving
    • Spring: 9in high travel spring, 550 lb/in rate
    • Spring top: pigtail, large
    • Shock body: lightweight billet aluminum, fully threaded
    • Ride height adjustable
    • 100% dyno tested and serialized
    • Bolt-in installation
    • Made in the USA
    • Sold in pairs
    • Part number: GS507-09550D

    Vehicle Applications:

    • 1963 Chevrolet Corvette
    • 1964 Chevrolet Corvette
    • 1965 Chevrolet Corvette
    • 1966 Chevrolet Corvette
    • 1967 Chevrolet Corvette
    • 1968 Chevrolet Corvette
    • 1969 Chevrolet Corvette
    • 1970 Chevrolet Corvette
    • 1971 Chevrolet Corvette
    • 1972 Chevrolet Corvette
    • 1973 Chevrolet Corvette
    • 1974 Chevrolet Corvette
    • 1975 Chevrolet Corvette
    • 1976 Chevrolet Corvette
    • 1977 Chevrolet Corvette
    • 1978 Chevrolet Corvette
    • 1979 Chevrolet Corvette
    • 1980 Chevrolet Corvette
    • 1981 Chevrolet Corvette
    • 1982 Chevrolet Corvette

    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 9in high travel spring with a 550 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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