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Adjustable EFI Regulator



Waterman Racing Adjustable EFI Regulator

High Performance, adjustable EFI regulator designed for medium to high horsepower applications. This regulators features Waterman Racing’s high-flow design, superb pressure control and legendary durability.

  • Gas, ethanol, methanol and diesel compatible.
  • 40-75 PSI adjustable base pressure range.
  • 1:1 vacuum/boost reference capability.
  • 1/8″ NPT dedicated gauge port.

P/N-43138 – 2x AN-06 inlets, AN-06 return

P/N-43139 – 2x AN-08 inlets, AN-06 return

P/N-43140 – 2x AN-10 inlets, AN-06 return

This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

Additional information

Inlet Size

AN-06, AN-08, AN-10

Return Size


Mounting Configuration: External

CARB or EFI Power Adder FUEL Horsepower