This is a direct replacement for the 3.8 bar fuel pressure regulator used in the Hydrospace watercraft MPE-750 160-180 kit. It can also be used in other Weber MPE-750 high performance applications requiring 3.8 bar constant fuel pressure and the OEM Weber fuel rail. It can also be used in other Weber MPE-750 high performance applications requiring 3.8 bar constant fuel pressure and the OEM Weber fuel rail.