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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Null
Carnegie, US
★★★★★ 5
Baby loved them!
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Baby loved all the flavors! Perfect way to expose baby to diverse tastes and flavors. Tried some myself and they all tasted fairly good for being baby food.
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Reviewed in the United States on December 14, 2025
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YM
Boise, US
★★★★★ 1
Caused pooping spree
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Serenity Kids food pouches have caused my baby to have multiple pooping sprees. I bought the products due to the rave reviews and organic ingredients. But there are way too many ingredients in one pouch for a baby, and while everything looks clean, not everything is good for an immature digestive system. For example, apple cider vinegar might have been the trigger of one pooping spree. But there are so many ingredients in these pouches, making it hard to narrow it down. What has happened is that these and other Serenity Kids pouches have caused my baby to poop 4-5 times a day, at times 2 days in a row. It's awful to see the little one with a screaming red bottom and to hear her cry at the top of her lungs on the diaper changing station. Serenity Kids should be ashamed. For a company marketing itself as offering healthy foods to babies, it has failed spectacularly.
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Reviewed in the United States on March 18, 2026
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Blondie
Port Orchard, US
★★★★★ 5
Funny
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Disclaimer: my review is nothing against the brand, I love Serenity Kids! I have been using the main starter pack with my (now 9MO) since he was 6MO. He has loved them all from the organic roots to the bison but dang, this "upgraded" pack threw him for a loop. Gagged at the beef pot roast. Probably won't be purchasing this variety pack again LOL
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Reviewed in the United States on November 9, 2025
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S+B
Pawtucket, US
★★★★★ 5
Great for a crunchy moms
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
These are some of my favorite puree pouches for my baby to eat. Simple ingredients and everything is organic. Usually no more than For possibly five ingredients.
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Reviewed in the United States on November 21, 2025
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C.L.
Natrona Heights, US
★★★★★ 5
Excellent privacy shade.
Color: Coal Black
This delivered on exactly what it promises. So happy with the quality for the value. The shades are a fabric, nylon like, that are attached with a pocket on one end and velcro that adheres around the bar on the other. This was incredibly easy and straightforward to put together. Every piece was clearly labeled, coordinated with the instruction sheet, and fit perfectly. Honestly, I wasn’t planning to leave a review but I was so impressed by how clearly labeled and well explained the instructions were that I felt compelled to note it. Especially for anyone who doesn’t like putting things together, or is used to subpar instructions, this is leagues above the rest. It’s such a simple build anyway, but after buying so many things that barely fit as they should, this stands out. It is lightweight and easy to move. Offers privacy when opened, then can be folded out of the way. It looks exactly as pictured. No complaints, it’s a solid item and worth the price.
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Reviewed in the United States on April 9, 2026

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