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Old 05-25-2000, 12:38 AM   #5
Scooby Specialist
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
2005 Legacy GT
98 BMW 540i LS2/T56


Actually it was modifying the vacuum signal to the fuel pressure regulator so that it would see more vacuum and raise the fuel pressure in the rails. I personally wouldn't do this, but to each his own.
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