Description Fuel Regulator 4.5Bar (66.10 PSI) FR-4.5 Extremely accurate, very small & compact fuel regulator. We no longer mount the fuel regulator on the end of the fuel rail as high spec engines sometimes create vibration, which was causes issue with the fuel rail, due to the weight of the regulator. We now recommend that the regulator is mounted remotely on all engines, except for bike engines where the throttle bodies are rubber mounted.
