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Overview of Porsche 911 MFI Traditional Context: Introduced in the early 1970s, the MFI system had been part of the effort to enhance functionality and efficiency inside of the Porsche emmergency 911 lineup. It seemed to be used primarily in the 911S and even 911E models coming from 1969 to 1973, replacing the previous carbureted systems. Mechanics of MFI: The MFI system is a new mechanical fuel injection system developed simply by Bosch, specifically known as the Bosch MFI system. It uses a series of mechanical components, like a fuel pump, a fu