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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Erin
Waukegan, US
★★★★★ 5
Game changer
Color: Blue Dog Ball Launcher, Size: One-Size
This has been such a game changer in playing fetch with my dogs. The ball fits inside great and it throws smoothly and goes quite a distance.
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Reviewed in the United States on December 11, 2025
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Tired Mother
Omaha, US
★★★★★ 3
Learning curve - but super fun
Color: Blue Dog Ball Launcher with Squeaking Handle, Size: One-Size
Okay- don’t get me wrong I know how to use a chuck it. But the handle of this has a squeaker - which is fantastic to get my ADHD dog to focus! Buuttt beware- it will take off your fingernail if you aren’t holding it properly when throwing. I learned that the hard way. Twice.
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Reviewed in the United States on May 3, 2026
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Shannon N.
Louisville, US
★★★★★ 5
BUY IT!!
Color: Blue Dog Ball Launcher, Size: One-Size
Great product!! Releases the ball nicely and saves my arm from dying at the end of the day. The construction of it feels flimsy but for someone who uses it AT LEAST 3 hours EVERYDAY, I would say it's pretty good quality. Would highly recommend!!
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Reviewed in the United States on December 4, 2025
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Draper, US
★★★★★ 5
Dog hasn’t destroyed the ball yet!
The ball that comes with this is amazing. I have a 1 yr pitty that destroys everything! But this ball she has not been able to rip apart. I bought extra balls I was so impressed. She loves it too, takes it to bed with her.lol
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Reviewed in the United States on April 15, 2026
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Liz Acosta
Dallas, US
★★★★★ 1
Cheaply made , waste of money
Cheap !! Lousy product did not fling at all. Lost the ball almost immediately since it went back instead of front. Do not recommend
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Reviewed in the United States on December 20, 2025

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