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    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
    • Carb/efi Adjustable Billet By-Pass Regulator-6AN Kit Carb/efi Adjustable Billet By-Pass Return Style Fuel Pressure Regulator 6AN Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference 11 Holley
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    Sale!

    Holley Carb/EFI Adjustable Billet Bypass Fuel Pressure Regulator Kit, 6AN, 4-65 PSI | 12-880KIT

    Vendor: Holley
    Part Number: 12-880KIT
    Save $36
    Sale Price $285.95 Regular Price $321.95

    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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    Machined from 6061-T6 billet aluminum, this bypass-style fuel pressure regulator adjusts from 4-65 psi and handles both carbureted and EFI applications, with a second spring included to extend the range for EFI systems. This kit adds a fuel pressure gauge and adapter fittings to get the install started.

    Specifications:

    • Category: Air and Fuel Delivery
    • Color: Black anodized base, clear anodized top
    • Fuel System: EFI/Carb
    • Fuel Type: Gasoline
    • Gauge Port: Yes
    • Inlet Size: 6 AN O-Ring
    • Material: Aluminum
    • Mounting Hardware Included: Yes
    • Outlet Size: 6 AN O-Ring
    • Return Size: 6 AN O-Ring
    • Style: Bypass
    • Sub Category: Carburetion
    • Warning: California Proposition 65
    • Warranty: Manufacturer's Limited 90 Day Warranty
    • Part Number: 12-880KIT

    Used in return-style fuel systems with a line back to the tank; includes 6AN O-ring inlet, outlet, and return ports, a fitting for manifold reference, and an 1/8 NPT gauge port. Boost reference is 1:1. Ships with the 4-15 psi carbureted spring installed.

    FAQ

    What's the adjustable pressure range?

    4-65 psi, covering carbureted and EFI applications with the included second spring.

    What port sizes does it use?

    6AN O-ring inlet, outlet, and return.

    What's included in the kit?

    The regulator, a fuel pressure gauge, and adapter fittings.

    Is this for return-style fuel systems?

    Yes, systems with a return line back to the tank.

    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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