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.