AEROMOTIVE Fuel Pressure Regulator. Performance EFI regulator designed for medium to high horsepower applications. This regulators features Aeromotive’s high-flow design, superb pressure control and legendary durability. On the street and at the track, this pressure regulator has logged more miles, laps and passes than any other performance EFI regulator in the world! This is now regarded as the best FPR by tuners from Subaru to Honda in the UK!