SKU: 84400020799

Holley Diecast In-Tank RetroFit Fuel Module Returnless System - 12-158

Sale price$382.48 Regular price$424.98
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Description

Holley Diecast In-Tank RetroFit Fuel Module Returnless System - 12-158Overview: 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 aluminum module design includes a die cast 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 (@ 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 7” 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
  • Die cast 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

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Application Universal
Brand Holley
Diameter 4.8"
Emission Code 3
Free Flow LPH 255
Material Die Cast Aluminum
NPT Thread 1/4 NPT
Product Type Fuel Pump Module
Warning California Proposition 65
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: 84400020799

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Betty C.
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★★★★★ 4
Sturdy and great looking
Color: Black
Great product, looks good.
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Reviewed in the United States on April 20, 2026
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Valeria Mayers
Omaha, US
★★★★★ 5
Kitchen organizer
Color: Black, Color: Black
5 star appearance, material, no assembly just place cup in the fitted area. ! Holds all my washing tools, dish detergent, rubber gloves n dish rag together; perfect. I thought it would be too small. Fits perfectly on the sink top.
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Reviewed in the United States on April 12, 2026
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D. Morgan
New York, US
★★★★★ 5
Exactly what my sink needed!!
Color: Black, Color: Black
Okay, this thing turned out to be way more useful than I expected. It’s big enough to actually hold everything — sponge, scrub brush, even the soap dispenser — without looking cluttered or crammed together. Plus everything dries faster, so my sink area finally doesn’t look like a wet chaotic mess all the time. 😅 The quality is really solid too. Feels sturdy, doesn’t rust, and was super easy to install. It stays put and keeps water from collecting around the sink, which honestly makes cleanup so much easier. Such a simple little product, but it really does make the kitchen look cleaner and more organized. Definitely recommend.
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Reviewed in the United States on May 26, 2026
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Amazon Customer
Omaha, US
★★★★★ 5
Worth the price !
Color: Black
This is a great way to put everything together. Everything on the counter looks organized and it’s a great wayto get all your sponges and dish soap and everything to look nice. I was pleased that it is well-made and sturdy. It’s very handy and I’m very happy with it. I’ve been using it for about a week. I have bought different products in the past which were OK but this one holds everything not just some. Do you highly recommend it it is worth the price !!
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Reviewed in the United States on June 1, 2026
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Babita
San Leandro, US
★★★★★ 5
It’s sturdy, easy to assemble
Color: Black
I really like this sink organizer. It’s sturdy, easy to assemble, and keeps my sink area neat and clutter-free. It holds soap, brushes, and sponges perfectly, while draining water well and staying clean without rusting.
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Reviewed in the United States on May 28, 2026

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