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    • Billet Bypass Fuel Pressure Regulator Kit Pressure Range 15-60 PSI Fittings and Gauge Included Holley
    • Billet Bypass Fuel Pressure Regulator Kit Pressure Range 15-60 PSI Fittings and Gauge Included Holley
    • Billet Bypass Fuel Pressure Regulator Kit Pressure Range 15-60 PSI Fittings and Gauge Included Holley
    • Billet Bypass Fuel Pressure Regulator Kit Pressure Range 15-60 PSI Fittings and Gauge Included Holley
    Sale!

    Holley Billet Bypass Fuel Pressure Regulator Kit, 4.5-9 PSI, -6 AN Fittings | 12-840KIT

    Vendor: Holley
    Part Number: 12-840KIT
    Save $44
    Sale Price $349.95 Regular Price $393.95

    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 billet bypass-style fuel pressure regulator kit features a black-finished billet aluminum body for corrosion resistance. It includes 3/8" NPT inlet/outlet ports, a 1/8" NPT gauge port, three Mr. Gasket 3/8" NPT-to-6AN fittings, a barbed vacuum port fitting, a mounting bracket, and all necessary hardware.

    Specifications:

    • Pressure Range: 4.5-9 PSI
    • Fuel System: Carbureted
    • Fuel Type: Gasoline
    • Inlet Size: 3/8" NPT
    • Outlet Size: 3/8" NPT (x2)
    • AN Fittings: 3x Mr. Gasket 3/8" NPT to -6 AN (481666-BL)
    • Gauge Port: Yes, 1/8" NPT, includes Earl's gauge (100187ERL)
    • Material: Aluminum
    • Color/Finish: Black
    • Mounting Hardware: Included
    • Warranty: Manufacturer's Limited 90 Day Warranty
    • Part Number: 12-840KIT

    FAQ

    What pressure range does this regulator adjust across?

    4.5-9 PSI.

    What fittings are included?

    Three Mr. Gasket 3/8" NPT to -6 AN fittings (481666-BL), plus a barbed vacuum port fitting.

    What's included in the kit?

    The regulator, a fuel pressure gauge, AN adapter fittings, a mounting bracket, and hardware.

    What port sizes does the regulator body use?

    3/8" NPT inlet and outlet ports, plus a 1/8" NPT gauge port.

    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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