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About

Mark Jung has been a diehard Porsche enthusiast ever since he traded his Marantz 250 stereo amplifier for a 1955 Porsche Speedster in the early 1970s. In 2007, while restoring his award-winning 1957 Porsche 356RS Outlaw, he became more interested in MFI performance. When he couldn’t locate any qualified experts to help with the fine-tuning of his Outlaw’s MFI pump, he took it upon himself to find a solution. After many years of learning about fuel injection efficiency, he now consults with other Porsche enthusiasts on the topic.

He founded MFI Werks in 2010, initially offering repair and calibration services for used Porsche MFI pumps. The company is now operating in Bend, Oregon, with a selective list of MFI-related services.


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