Double Adjustable Fuel Regulator

2 Port Double Adjustable Regulator 8 AN Adjustable from 4-9 PSI

PART# 12-884

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Holley's new double adjustable fuel pressure regulators are designed for belt or cable driven pumps where fuel flow changes with engine rpm. These regulators are compatible with E85 and alcohol applications. Made from billet aluminum, these regulators are offered in both 2-Port and 4-Port models to complete your fuel system requirements. The idle adjustment design is strategically placed so that none of the ports are blocked like other designs. These regulators retain the true 2 and 4 port flow. • Alcohol and E85 compatible. • 2 Port models available with 8AN and 10AN port sizes


  • Individual adjustment settings, one for idle and wide open throttle.
  • Fuel pressure adjustability at idle can help prevent flooding at low rpms
  • Wide open throttle settings help to prevent fuel starvation at the top end of the rpm range
  • Alcohol and E85 compatible.


ColorBlack Anodized
Emission Code3
Fuel SystemCarbureted
Fuel TypeE85/Alcohol
Inlet Size-8 AN
Outlet Size-8 AN
Pressure Range4-9 PSI
Product TypeRegulator
StyleDouble Adjustable
Part Number12-884


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

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      Some parts are not legal for use in California or other states with similar regulations.