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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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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Shannon Patton
Natrona Heights, US
★★★★★ 5
Glowy skin hydration
Size: 6.8 Fl Oz (Pack of 1)
Golden goddess results unlocked !!!! If you’re not tan it adds a nice glow. But if you’re tan ( fake or not) this product will make your skin look hydrated, glowy, bronzed and highlighted. I’m on the older side so I have some crepey skin on my inner arms, this makes it look 100 times better. I also only self tan, I find this helps my “tan” last longer. Has a nice tropical scent that gradually fades.
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Reviewed in the United States on May 17, 2026
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Jennifer Smith
Waukegan, US
★★★★★ 5
Soft Bronzy Glow
Size: 6.8 Fl Oz (Pack of 1)
I received a stinky oil in a subscription box, I love how soft it makes my dry diabetic skin feel. Oil leaves skin much softer than a moisturizer does, however, I was put off by the strong magnesium smell. I found this Vaseline Oil online and decided to try it instead. Firstly, the smell is so much more enjoyable and the shine it left behind is unmatched. I used it directly after a shower, applying it to my skin while I was still partially wet. Doing this, traps moisturize in the skin and leaves behind a beautiful bronzy glow. Unlike my moisturizer, I find I do not need to reapply daily, instead I only use every 2 to 3 days because it keepsy skin so very soft. I would recommend this to any diabetic with dry skin.
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Reviewed in the United States on March 5, 2026
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Kendall Carloss
New York, US
★★★★★ 5
Gorgeous Glow
Size: 6.8 Fl Oz (Pack of 1)
This products leave the best subtle glow! The shimmer last very long and it isn’t greasy. I apply with a body brush or my hands and it spreads pretty evenly.
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Reviewed in the United States on May 16, 2026
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Lisa Davison
Bozeman, US
★★★★★ 3
Works great, a tad "tacky" in feeling!
Size: 6.8 Fl Oz (Pack of 1)
Mixed review. The product smells great, provides good moisturizing effects and glistens on the skin. Drawback, it remains sticky on the skin. It is an oil so some oily feeling is to be expected, but the tackyness is what I dislike. Especially when doing outdoor activities where everything that drifts in the wind will stick to your skin due to the oil. If you do not mind that feeling, you will love the product and the results.
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Reviewed in the United States on May 14, 2026
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candi muncy
Chelsea, US
★★★★★ 5
Great for post microneedling or tattoos
Size: 1.3 Fl Oz (Pack of 1)
Great for skin after microneedling. Keeps skin feeling smooth, non-greasy
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Reviewed in the United States on April 21, 2026

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