SKU: 53476960232

Holley In-Tank RetroFit Fuel Module-Returnless Style - 12-131

Sale price$382.48 Regular price$424.98
Save 10%

Pay in installments of $106.25 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Biscuit
Omaha, US
★★★★★ 5
Excellent
Flavor Name: Peanut Butter, Size: Medium
I will purchase this again and again as long as it is made in the USA. I have bought this specific toy 3 times for one of my dogs. He still has all three of them. They are durable, long lasting and are not dangerous like some toys are if they start to come apart or after they’ve been chewed on for a while. With these chew toys, you can tell they’ve been chewed on but they don’t fall apart or come apart in large chunks. I watch my dogs with their toys and have had to take away other toys, even from Nylabone, because large pieces will come off or they will get too sharp where they’ve been chewed. Not this one. I’ll keep buying this one as long as it is USA-made. My dog has not damaged his teeth on this toy. I do get the wolf size which is good for dogs up to 50 pounds and he is 66 pounds.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2020
L
Verified Purchase
Lori
Battle Creek, US
★★★★★ 3
Some dogs will probably love this.
Flavor Name: Peanut Butter, Size: Medium
My dogs were not very excited about this bone. I don’t think they are particularly picky, so I’m not sure why.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026
D
Verified Purchase
D. Dirkson
Fort Morgan, US
★★★★★ 5
Depending on dog size, you may want to adjust bone size
Flavor Name: Peanut Butter, Size: Medium
This bone is attractive to both my 60 lb dogs. They're more light to moderate chewers at best but I remember when my youngest was a puppy, these things would buy me quite a few hours of quiet time. We repeatedly bought the ring style- must have had at least 5 as she was a rather voracious chewer. However, I don't mind replacing Nylabones one bit; they hold up well/can take A LOT of wear and make an excellent redirect for your bored puppy who ruined your favorite pair of shoes. I went down a size and bought a medium; I find that both dogs (full sized male Australian Shepherd + female lab/doberman mix) have trouble carrying a large size due to weight and this one is perfect for them! I would previously buy large ones who would barely ever get touched. However, you also don't want to buy one that's too small, so it's a fine line when you've got a dog who is somewhat in a weight range borderline.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2018
K
Verified Purchase
Kindle Customer
Grantham, US
★★★★★ 5
My dogs love this and it lasts a long time
Flavor Name: Bacon, Size: Medium
I have three dogs and it lasts a really long time even with them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
L
Verified Purchase
LC
Boise, US
★★★★★ 5
Safe chew bone for strong chewers.
Flavor Name: Bacon, Size: Medium
This bone is exactly as advertised. I feel comfortable knowing it won’t splinter and last a good while. Only bone I let my dog chew.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026

recommand products