• 510-12-130_1
  • Holley Fuel Pump assy
  • Drilling Fuel tank

Holley Retrofit 255LPH In Tank Fuel Pump

In-Tank RetroFit Fuel Module 255 LPH Pump w/ Hydramat

SKU: TD-12-131

In-Tank RetroFit Fuel Module

  • 255 LPH Pump w/ Hydramat
  • Works with a Return-style Fuel System
  • Supports up to 550 EFI or 700 Carb HP (HP Rating @ 60 PSI at 13.5 Volts / 10.4 AMP Draw)



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  • The easiest way to convert your vehicle to an in-tank, EFI fuel system
  • Installs in any fuel tank from 6-1/2” 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 encounter
  • Black anodized aluminum construction for corrosion resistance and long lasting good looks
  • 1/4” 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