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  • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
  • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
  • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
  • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
  • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    • 12-131.jpg
    • 12-135_05.jpg
    • 12-135_09.jpg
    • 12-135_11.jpg
    • img_1539.jpg
    • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    • In-Tank Retrofit Fuel Module-Returnless Style 255 LPH Returnless Drop-In Retrofit EFI Fuel System W/hydramat Supports Up to 550 EFI or 700 CARB HP (HP Rating At 60 PSI at 13.5 Volts / 10.4 AMP Draw) Holley
    Sale!

    Holley In-Tank Retrofit Fuel Module, Returnless, 255 LPH, Up to 550 EFI HP | 12-131

    Vendor: Holley
    Part Number: 12-131
    Save $107
    $849.95 $956.95

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    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.
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    Product DetailsFAQReviewsRelated Products

    This Holley In-Tank RetroFit Fuel Module converts a factory tank or fuel cell into an in-tank EFI fuel system without welding or fabrication, pairing a 255 LPH returnless pump with an integrated Holley Hydramat for consistent fuel supply.

    Specifications:

    • Product Type: Fuel Pump Module
    • Style: Returnless
    • Flow Rate: 255 LPH
    • HP Rating: Up to 550 EFI HP or 700 Carbureted HP (@ 60 PSI, 13.5V, 10.4A draw)
    • Fits Tank Depths: 8" to 12"
    • Module Diameter: 5" (1.275" thick above tank surface)
    • Ports: 1/4" NPT
    • Construction: Black Anodized Aluminum
    • Fuel Pressure Regulator: Internal, preset to 60 PSI
    • Part Number: 12-131

    Holley recommends pairing this module with a 12-753 30-amp fuel pump relay and a minimum 12-gauge wire; maximum line/fitting size is 6AN due to space limitations between the unit and fuel tank. Ideal for Terminator EFI, Sniper EFI, MSD Atomic EFI, or any TBI/EFI conversion.

    FAQ

    What is the flow rate of this fuel module?

    255 LPH.

    How much horsepower can it support?

    Up to 550 EFI HP or 700 carbureted HP at 60 PSI, 13.5 volts, with a 10.4 amp draw.

    What tank depths does it fit?

    Fuel tanks from 8 to 12 inches deep.

    Does it include a fuel pressure regulator?

    Yes, an internal regulator preset at 60 PSI, so no return line is required.

    What wiring and relay does Holley recommend?

    A Holley 12-753 30-amp fuel pump relay with a minimum of 12-gauge wire.

    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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    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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