SKU: 40555299493

Holley Diecast In-Tank RetroFit Fuel Module w/Return - 12-137

Sale price$404.98 Regular price$449.98
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

Holley Diecast In-Tank RetroFit Fuel Module w/Return - 12-137Overview: 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 875 EFI or 1100 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 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 7.5” 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
  • 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 450LPH 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 450
Fuel Type E85
Fuel Type Gasoline
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: 40555299493

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4.6 ★★★★★
Based on 15 reviews
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Product Reviews
J
Verified Purchase
jeanette maldonado
Cuba, US
★★★★★ 5
Awesome Product.
Style: Boxed Type - 16 PCs
Awesome product. Very easy to use repaired my tire with no issues. It’s a very compact kit. Great price. The plug has proved to be durable as I’ve been driving the car with no leaks or issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
K
Verified Purchase
Kevin
Whiting, US
★★★★★ 5
Very handy tool
Style: Boxed Type - 16 PCs
Great tool. Worked perfectly and has a nice small case for easy storage . This came fast and was exactly as described
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
C
Verified Purchase
Charles
Lowell, US
★★★★★ 5
Very good product
Style: Boxed Type - 16 PCs
I let my wife fix a tire with, she is a tiny little femine girl, had no trouble, little hard pushing the plug thru but managed, fuxed no leaks, very good product, and heavy duty not a limsy like plastic thin
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
T
Verified Purchase
Tim Adkins
San Leandro, US
★★★★★ 4
Quality
Style: Boxed Type - 16 PCs
Seems to be good quality. Haven’t used yet and hope I don’t need too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
D
Verified Purchase
Donnie McElyea
Cuba, US
★★★★★ 5
Great tire repair kit.
Style: Boxed Type - 16 PCs
Worked great. Everything in the kit was good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026

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