Holley 12-158 Diecast In-Tank Retrofit Fuel Module Returnless System 255 LPH Drop-In Retrofit EFI Fuel System W/hydramat Supports

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 5 inch diameter 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 (@ 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 and Benefits:

• The easiest way to convert your vehicle to an in-tank, EFI fuel system Installs in any fuel tank from 7 inch to 12 inch deep to fit a wide variety of applications The low profile 5 inch diameter design is only 1.275 inches 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 inch x 15 inch 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 14 inch 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

Associated Comments:

• 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.

Details:

• Application: Universal
• Average Current Draw: 10.4 Ampere
• Average Flow Rating: 255 Liters per Hour
• Connector Color: Black
• Connector Gender: Male
• Connector Quantity: 1.0
• Free Flow Lph: 255
• Fuel Type: Gasoline
• Fuel Filter Included: Yes
• Fuel Sending Unit Included: No
• Fuel Tank Pressure Sensor Included: No
• 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: 1/4 Inch
• 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: 60 Pounds per Square Inch
• Minimum Fuel Tank Depth: 7 inches
• Mounting Hardware Included: Yes
• NPT Thread: 1/4 NPT
• Negative Ground: Yes
• Outlet Fitting Thread Size: 1/4 Inch
• Outlet Quantity: One
• Outlet Size: 1/4 inch NPT
• Outlet Type: NPT
• Pump Type: Electric
• Regulator Included: No
• Top Mount Diameter: 5 Inch
• Universal Or Specific Fit: Universal
• Voltage: 12 Volts DC
  
• Wire Harness Included: Yes
• Wire Quantity: 2.0

Installation Guide: Download PDF

Installation / Product Video: Watch on YouTube

⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.

Warranty: Manufacturer's Limited 90 Day Warranty