SKU: 84400020799

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

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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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4.8 ★★★★★
Based on 6 reviews
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A
Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
Built for people who love nugget ice!
Color: Piano Black
If you love nugget ice, this machine delivers exactly what you’re hoping for - soft, chewable, restaurant-quality pellet ice at home, consistently and quickly. The biggest differentiator is speed and volume. It produces up to 35 lbs per day, and the first batch is ready fast. The ice texture is true crushed pebble/nugget style - not hard cubes disguised as “pellet” ice. It’s ideal for iced coffee, sparkling water, cocktails, and entertaining. The stainless steel exterior feels premium and modern on the countertop. Noise level is typical for a countertop ice maker, noticeable but not disruptive. It’s not silent, but it’s absolutely reasonable for the output.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
T
Verified Purchase
todd
Alexandria, US
★★★★★ 5
Great Ice Machine
Color: Piano Black
This ice machine works amazing and the ice is perfect! Doesn't take long to produce the ice either! Would buy again!!
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Reviewed in the United States on May 25, 2026
C
Verified Purchase
Carrie G.
Battle Creek, US
★★★★★ 2
Short life span
Color: Piano Black
We really liked this ice maker. The good-the water reservoir and ice basket are larger than in our last one, so we only refilled this one maybe once a day (family of 4). The ice didn't build up on the side and trigger the ice maker full shut off like our previous one. It is quieter than our last one too, and seemed to make ice just as fast. The bad-it doesn't turn itself back on as the ice melts and refills the water reservoir. The really bad-we've only used distilled and RO water in it. We've been fighting with it for a couple of months now to get it to make ice. We've cleaned it over and over with the cleaning solution. We also cleaned the vents as suggested with a vacuum and compressed air. It's to the point that it literally makes 2 ice cubes every time we start it, and that's it. We bought it 6 months, and we're giving up on it. We'll try another brand.
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Reviewed in the United States on June 1, 2026
P
Verified Purchase
P. Trinh
Lexington, US
★★★★★ 4
Almost Perfect
Color: Piano Black
Came from another ice maker and I miss two things: 1) size. This unit is tiny. It might be good if it’s just for you and maybe one other person, but for a family of four where everyone uses ice for their drinks and water bottles around the clock, this was constantly empty and needing more water. 2) the ability to start making ice on its own after there’s enough water. It has a sensor to tell you when it’s full of ice and it has a sensor to tell you when the water level is low, but it doesn’t have a sensor to tell it when the water has been refilled. You have to push the “ice making” button twice to get it to restart. Not a huge problem, but if you’re like me and leave your ice machine on 24hrs a day, you could come back to an empty ice machine after the ice in the basket melts. With my old ice maker, the machine would sense the water was low and stop. But then all the ice that was already made and in the basket would melt and fill the reservoir again and the machine would sense that and start back up on making a new batch small gripes, I know. Overall, it’s a nice, cute little ice maker and my kids love nugget ice.
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Reviewed in the United States on April 9, 2026
P
Peace
New York, US
★★★★★ 5
Compact, lightweight, and useful milk frother.
I ordered the Electric Handheld Milk Frother in the Starlight Black color. I don’t drink coffee, let alone fancy coffees where I would normally need a milk frother, so I bought this for one reason and one reason only: scrambled eggs. I make a ton of scrambled eggs. Now, I can whisk eggs by hand just as well as the next person, and I’m not entirely convinced a frother whips them better than I can, but regular whisks take up a ton of room in my drawers and this does not. I really just wanted something compact that could whip my eggs into a nice frothy consistency without taking up much space. Even better, this one looks nice enough to just leave sitting on the counter where I can grab it easily. I will note that although I can hand whisk easily enough, there are many people who cannot due to arthritis or other issues, and this whisk is a brilliant tool for them. If you actually want to use a frother for other things, this one does perform very well. It has three speeds and comes with three different attachments: a spring whisk for latte and cappuccino foam, a balloon whisk for eggs and cream, and a hook whisk for blending protein powders or mixes without lumps. I actually ended up using the hook whisk while making pot roast. I mixed the seasoning packet with water using this frother and it blended everything perfectly with no lumps at all. The frother itself is lightweight, pretty quiet, and very easy to clean. The attachments detach easily and just need a quick rinse under soapy water. It also comes with a magnetic wireless charging dock that uses the included USB-C cable. The docking connection is simple and secure, and charging has been completely hassle-free so far. The LED display shows battery levels at 25%, 50%, 75%, and 100%, which is useful for knowing when it needs to be charged. Overall, it’s a simple, convenient kitchen gadget that does exactly what I wanted it to do and I am quite satisfied with it.
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Reviewed in the United States on May 21, 2026

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