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    Sale!

    Holley EFI Water/Methanol Injection Pump, High Pressure, 12V | 557-100

    Vendor: Holley EFI
    Part Number: 557-100
    Save $55
    Sale Price $437.95 Regular Price $492.95

    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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    This high-pressure water/methanol pump is designed for use with Holley HP and Dominator EFI systems, which characterize solenoid flow within the ECU for precise, tunable water/methanol delivery.

    Specifications:

    • Voltage: 12VDC nominal
    • Max Liquid Temperature: 180°F (82°C)
    • Prime: Self-priming to 9.0 ft vertical; max inlet pressure 30 PSI (2.1 Bar)
    • Ports: 3/8"-18 NPT female
    • Net Weight: 4.5 lbs (2.0 kg)
    • Duty Cycle: Continuous
    • Bypass: 145 PSI max
    • Max Pressure: 145 PSI
    • Amp Draw: 7.5A @ 140 PSI
    • Part Number: 557-100

    Compatible with water/methanol mixes up to 50% methanol. If an extra injector driver output isn't available (such as on an HP ECU driving 8 injectors), Holley P/N 554-115 can be used with a low-side PWM output instead.

    FAQ

    What systems does this pump work with?

    It's built for use with Holley HP and Dominator EFI systems' integrated water/methanol injection control.

    What's the maximum methanol mix it supports?

    All components are designed to handle up to a 50% methanol mix.

    What if I don't have a spare injector driver output for the solenoid?

    You can use Holley P/N 554-115, which can be driven by a low-side PWM output instead.

    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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