SKU: 53476960232

Holley In-Tank RetroFit Fuel Module-Returnless Style - 12-131

Sale price$382.48 Regular price$424.98
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Description

Holley In-Tank RetroFit Fuel Module-Returnless Style - 12-131Overview: Are you interested in an EFI retrofit kit, but just can't get past the complication of the fuel system? Holley is proud to introduce their Universal In Tank Retrofit Fuel Modules! Available in return and returnless versions, you can rest assured Holley has the solution you need for your EFI fuel pump woes. Now you can convert your factory tank or fuel cell to an in tank EFI fuel system quickly and easily! And add the benefits of a Holley

Overview:

Are you interested in an EFI retrofit kit, but just can't get past the complication of the fuel system? Holley is proud to introduce their Universal In-Tank Retrofit Fuel Modules! Available in return and returnless versions, you can rest assured Holley has the solution you need for your EFI fuel pump woes. Now you can convert your factory tank or fuel cell to an in-tank EFI fuel system quickly and easily! And- add the benefits of a Holley Hydramat in the process! The conversion is easily accomplished with basic tools and requires no welding or fabrication. The billet aluminum module design includes a billet pump hanger bracket to control pump vibration while also providing a low profile design to fit where space is at a premium. Holley's innovative clamping system and integrated fuel pump makes it easy. Once installed, hook up your fuel lines and your power source/ground and you're off and running! NO hassle! Supports up to 550 EFI or 700 Carb HP (HP Rating @ 60 PSI at 13.5 Volts / 10.4 AMP Draw) Of course there are many variables, estimates are based on gasoline. Individual systems will vary based on fuel system design, regulator type, fuel cell location, etc...

Features:

  • The easiest way to convert your vehicle to an in-tank, EFI fuel system
  • Installs in any fuel tank from 8.5” to 12” deep to fit a wide variety of applications
  • The low profile design is only 1.275" thick above the tank mounting surface for added clearance when needed
  • The innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit
  • The clamping system allows you to rotate the unit 360 degrees for easier clocking of the plumbing and wiring locations under your ride
  • Includes innovative Holley Hydramat to ensure consistent fuel supply. The 3” x 15” HydraMat mounting flange has 6 clocking pin locations to allow for 360 degree adjustment to clear sending unit levels or any tank floor restrictions that you might encoun
  • Black anodized aluminum construction for corrosion resistance and long lasting good looks
  • ¼” NPT ports for a wide variety of plumbing options
  • Ideal for Terminator EFI, Sniper EFI, MSD Atomic EFI or any TBI of EFI conversion
  • Optional roll over valve available
  • Two different fuel pumps are available to match your requirements - 255LPH or 400LPH for both return and returnless style systems
  • Eliminates the need for a return line and conventional fuel pressure regulator. Thus, simplifying your installation
  • Includes an internal fuel pressure regulator preset at 60 psi for a wide variety of applications. No return line required!

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Application Universal
Brand Holley
Diameter 4.8"
Emission Code 3
Free Flow LPH 255
Material Billet Aluminum
NPT Thread 1/4 NPT
Product Type Fuel Pump Module
Warranty Limited 90 Day
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 53476960232

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gmarlin
Whiting, US
★★★★★ 3
Looked good
Color: Black
It was a gift, so I don't have anything to say about it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
L
Verified Purchase
lisa
Los Angeles, US
★★★★★ 5
Love it
Color: Black
The best magnetic phone holder
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Reviewed in the United States on March 30, 2026
G
Verified Purchase
G M Sherman
Natrona Heights, US
★★★★★ 2
Does not hold as advertised
Color: Black
When the dash got hot from the sun, the glue gave way and everything ended up on the floor. Couldn’t send it back because the time limit had passed but I don’t use it
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Reviewed in the United States on April 26, 2026
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Lina
West Palm Beach, US
★★★★★ 5
What a Cute Egg… Err Flower
Easy to install and easy to use! It’s as simple as turning two knobs to tighten onto the screen and placement of the arm. So adorable and has a strong magnet. Looks a little like an egg but who doesn’t love eggs and daisies?
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Reviewed in the United States on August 4, 2025
R
R
West Palm Beach, US
★★★★★ 3
Good mount for tesla cars
Build The design is a very different when compared to regular magnetic mounts. Some people will like it and others wouldn't. This looks like a daisy flower and can be mounted to any tesla car. Material The phone holder itself seems to be made of good materials, and offers a sturdy mount that remains secure in place. It does take some cranking to tighten and there is always a worry of over tighetening and breaking it. Functionality Installation and removal are straightforward and quick. The magnet provides a strong hold for my Samsung Ultra, and keeps it firmly in position during drives. Value for Money (VFM) At $16, the product offers good value, however at a tad higher price. Would recommend only to those who like the looks and need the mounting functionality.
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Reviewed in the United States on September 30, 2025

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