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    Sale!

    Holley Dual Tank Fuel Pump Switching Valve Kit, MPI/TBI/Terminator EFI | 534-39

    Vendor: Holley EFI
    Part Number: 534-39
    Save $20
    Sale Price $155.95 Regular Price $175.95

    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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    This kit lets Holley MPI, TBI, and Terminator EFI systems operate on vehicles with dual fuel tanks. Since these EFI systems require a fuel return line, the switching valve ensures fuel returns to the tank it was drawn from.

    Specifications:

    • For Holley MPI, TBI, and Terminator EFI Systems
    • Rated for Systems up to 400 HP
    • Includes Switching Valve, Relay, Switch, and Harness
    • Part Number: 534-39

    Installation also requires fuel hose, EFI pressure-rated hose clamps, 18-gauge wire, a 10-amp inline fuse, assorted terminals, and hose assembly lube (not included). The selection valve switches tanks by reversing polarity on the "D" and "E" terminals — many dual-tank trucks already have this type of valve and hardware.

    FAQ

    What EFI systems does this kit support?

    Holley MPI, TBI, and Terminator EFI systems used on vehicles with dual fuel tanks.

    What's included?

    A switching valve, relay, switch, and wiring harness.

    What else is needed for installation?

    Fuel hose, EFI-rated hose clamps, 18-gauge wire, a 10-amp inline fuse, terminals, and assembly lube — none of which are included.

    What's the maximum horsepower rating?

    The kit is rated for fuel pump systems up to 400 HP.

    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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