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    • 554-115.jpg
    Sale!

    Holley 2-Channel Peak and Hold Water/Methanol Injection Driver Module | 554-115

    Vendor: Holley EFI
    Part Number: 554-115
    Save $102
    $84.95 $186.95

    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.
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    Product DetailsFAQReviewsRelated Products

    This driver module lets a Holley Dominator or HP ECU trigger Holley water/methanol injection solenoids (P/N 557-103, 557-105, 557-106) when a dedicated injector driver output isn't available. It's driven from one of the ECU's Pulse Width Modulated outputs and can control two solenoids, one per output channel.

    Specifications:

    • Channels: 2 (peak and hold, one solenoid per channel)
    • Application: Water/Methanol Injection solenoid driver
    • Compatible Solenoids: Holley 557-103, 557-105, 557-106
    • Trigger Input: PWM+ or PWM- output from Dominator/HP ECU (grey wire sets polarity)
    • Includes: All necessary electrical connectors
    • Part Number: 554-115

    FAQ

    What solenoids does this module drive?

    Holley water/methanol injection solenoids, part numbers 557-103, 557-105, and 557-106.

    How many solenoids can it control?

    Up to two, one on each of the module's two output channels.

    How is it triggered?

    By a Pulse Width Modulated (PWM+ or PWM-) output from a Dominator or HP ECU; the grey wire sets whether the trigger is a ground or +12V PWM signal.

    Does it include wiring connectors?

    Yes, all necessary electrical connectors are included.

    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.
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    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.

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