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03-30-2021, 08:39 AM
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#2561
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///M Powered for Life
Drives: E90M/E92M/M4GTS/M4GT4/M6/X5M
Join Date: Sep 2010
Location: Greenwich, CT
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In a supercharged Z4M we ran into terminal brake booster issues. Ended up running an aftermarket vacuum pump that is switched on whenever the car is at the track
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