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    QA1 Proma Star Single-Adjustable Coilover Strut | 1979-1993 Mustang | HS01

    Vendor: QA1
    Part Number: HS01
    Regular Price $499.95

    In Stock

    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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    The QA1 Proma Star strut is an inverted monotube strut for 1979-1993 Mustang that suits both street driving and track use. Its large diameter shaft resists side loading for smooth, consistent performance under hard cornering and braking, while the lightweight threaded aluminum body reduces unsprung weight for better suspension response. Single-adjustable rebound is set with an 18 position knob at the top of the strut tower.

    Specifications:

    • Type: Proma Star inverted strut (one strut only)
    • Valving: Single-adjustable, 18 position rebound
    • Body: Threaded aluminum
    • Fitment: Wide and narrow spindle Fox Body applications
    • Caster camber plates: Required and sold separately (CC110 for 1979-1989, CC112 for 1990-1993)
    • Coil-over conversion: Kit COK113 available separately
    • Made in: USA (Lakeville, Minnesota)
    • Part number: HS01

    Vehicle Applications:

    • 1979 Ford Mustang
    • 1980 Ford Mustang
    • 1981 Ford Mustang
    • 1982 Ford Mustang
    • 1983 Ford Mustang
    • 1984 Ford Mustang
    • 1985 Ford Mustang
    • 1986 Ford Mustang
    • 1987 Ford Mustang
    • 1988 Ford Mustang
    • 1989 Ford Mustang
    • 1990 Ford Mustang
    • 1991 Ford Mustang
    • 1992 Ford Mustang
    • 1993 Ford Mustang

    FAQ

    Does the HS01 include a spring or caster camber plate?

    No. The HS01 is one individual Proma Star strut only. QA1 caster camber plates are required and sold separately, CC110 for 1979-1989 and CC112 for 1990-1993.

    Is the strut adjustable?

    Yes. It is single-adjustable with an 18 position rebound knob at the top of the strut tower.

    What vehicles does the HS01 fit?

    It fits 1979-1993 Ford Mustang, including wide and narrow spindle Fox Body applications.

    Can the HS01 be run as a coil-over?

    A coil-over conversion kit is available separately as COK113.

    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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