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    • Vibrant LS Engine Fuel Pressure Gauge Adapter Fitting | Female -4 AN x Female 1/8 in NPT | 16791
    • Vibrant LS Engine Fuel Pressure Gauge Adapter Fitting | Female -4 AN x Female 1/8 in NPT | 16791
    • Vibrant LS Engine Fuel Pressure Gauge Adapter Fitting | Female -4 AN x Female 1/8 in NPT | 16791
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    Vibrant LS Engine Fuel Pressure Gauge Adapter Fitting | Female -4 AN x Female 1/8 in NPT | 16791

    Part Number: 16791
    Save $5.21
    Sale Price $15.29 Regular Price $20.50

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    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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    The Vibrant LS engine fuel pressure adapter lets an aftermarket fuel pressure gauge mount to the factory fuel rail of a Chevy LS engine once the Schrader valve is removed. One end carries a female -4 AN thread and the other a female 1/8 in NPT thread, which also makes it useful for other gauge and sensor applications.

    • Type: Fuel pressure gauge adapter fitting
    • Application: Chevy LS factory fuel rail (Schrader valve removed)
    • Thread 1: Female -4 AN
    • Thread 2: Female 1/8 in NPT
    • Part number: 16791

    FAQ

    What does the Vibrant 16791 adapter do?

    It lets an aftermarket fuel pressure gauge mount to a Chevy LS factory fuel rail after the Schrader valve is removed.

    What thread sizes does it use?

    It has a female -4 AN thread on one end and a female 1/8 in NPT thread on the other.

    Can it be used for other applications?

    Yes. The -4 AN and 1/8 in NPT threads suit other gauge and sensor setups.

    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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