Holley Diecast In-Tank RetroFit Fuel Module Returnless System 12-159
SKU: 21499747504

Holley Diecast In-Tank RetroFit Fuel Module Returnless System 12-159

Sale price$427.48 Regular price$474.98
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Description

Holley Diecast In-Tank RetroFit Fuel Module Returnless System 12-159450 LPH Drop In Retrofit EFI Fuel System w Hydramat 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. 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

450 LPH Drop-In Retrofit EFI Fuel System w/Hydramat 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.

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.

NOTES: It is recommended to use a Holley 12-753 30 Amp Fuel Pump Relay along with a minimum size of 12 Gauge wire for your installation. *** Maximum 6AN line and fitting size due to space limitations between unit and fuel tank.

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 5 inch diameter design is only 1.275 inch 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
  • Die cast aluminum construction for corrosion resistance and long lasting good looks
  • ?? 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

Specs:

Application Universal
Average Current Draw 16.9Ampere
Average Flow Rating 450Liters per Hour
Brand Holley
Clearance Category Air and Fuel Delivery
Connector Color Black
Connector Gender Male
Connector Quantity 1
Discount Percentage 26-50%
Emission Code 5
Finish Black
Free Flow LPH 450
Fuel Filter Included Yes
Fuel Sending Unit Included No
Fuel Tank Pressure Sensor Included No
Fuel Type E85, Gasoline
Gasket Or Seal Included Yes
Gasket Or Seal Material Foam
Grade Type Performance
Height Adjustable
Housing Material Aluminum
In Tank or External In Tank
Inlet Fitting Thread Size 1/4Inch
Inlet Quantity One
Inlet Size 1/4 inch NPT
Inlet Type NPT
Internal Or External Strainer External
Lock Ring Included No
Material Die Cast Aluminum
Maximum Pressure 60Pounds per Square Inch
Minimum Fuel Tank Depth 7 inches
Mounting Hardware Included Yes
Negative Ground Yes
NPT Thread 1/4 NPT
Outlet Fitting Thread Size 1/4Inch
Outlet Quantity One
Outlet Size 1/4 inch NPT
Outlet Type NPT
Product Type Fuel Pump Module
Pump Type Electric
Regulator Included No
Sale Category Air and Fuel Delivery
Top Mount Diameter 5Inch
Universal Or Specific Fit Universal
Voltage 12Volts DC
Warning California Proposition 65
Warranty Limited 90 Day
Wire Harness Included Yes
Wire Quantity 2
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: 21499747504

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4.7 โ˜…โ˜…โ˜…โ˜…โ˜…
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AMAZON CUSTOMER
Draper, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
plug and play ...fast ...hi performance... same as higher price
plug and play ...fast ...hi performance... same as higher price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
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H. T.
Draper, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
premium feel in the hand.
Can't really say whether it's that good or not elecronics wise since I didn't test it but it works like it's supposed to. Meanwhile, the housing oh man. It's premium. It feels like hard aluminum or something, very nice. Edges are rounded too with just the right sharpness like a macbook. Others would've been plastic. This is really nice for the price and if the specs really are 10Gbps, that's really good because most in this price range is 5Gbps.
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Reviewed in the United States on March 2, 2026
A
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Amazon Customer
Bozeman, US
โ˜…โ˜…โ˜…โ˜…โ˜… 1
Failed to support desktop PCs with USB 3.2 Gen 2 ports
Does not work with my HP mini PC with USB 3.2 gen 2 ports - when connecting USB portable SSDs to the hub. You won't believe it, but many USB 3.2 Gen 2 hubs only support laptops not desktop PCs (except hubs that have dedicated power supply for higher power USB devices e.g. SSD/HDDs) when connecting USB portable SSDs to the hub. We need a major fix from many of the USB hub vendors so these products can work with desktop PCs that have USB 3.2 Gen 2 ports. Workaround: Just directly connect the USB portable SSD to the PC instead. If you need more USB ports, pick up a good old USB 3.0 hub. They're working correctly with portable USB SSDs when working with desktop PCs. (You'd need a powered USB hub if you're connecting 2 or more portable SSDs - do your own calculation: 5V - 1A per SSD/HDD).
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Reviewed in the United States on November 2, 2025
M
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Menace
Phoenix, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Worked like a charm
Style: 5-in-1 USB-C Hub
This thing worked exactly as i needed it to. Was able to connect to a phone with a cooked screen, download all the content to another device, I'm a happy camper.
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Reviewed in the United States on June 7, 2026
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American Wireman
Belleville, US
โ˜…โ˜…โ˜…โ˜…โ˜… 5
Need more USB-C ports AND passthrough power?
Style: 4-in-1 USB-C Hub
This hub is very handy if you need to use multiple USB-C peripherals but still need passthrough power for your laptop, 65 watts in my case. I have not experienced any noticeable difference in transfer speeds or heat. Typical Belkin high quality, all the ports are tight and connections feel secure. I want to note that this unit will NOT allow HDMI functions via USB-C. I still need to plug my external display directly into the other USB-C port on my laptop. The only downside is that the surface of the hub is a high gloss black, which will scuff like crazy the first time you toss it into your backpack or set it on the table. Does not at all effect functionality but can be annoying for some. Otherwise, this is now one of my essential daily tech accessories.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 1, 2025

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