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Actually, that's not true with a Cobb AP flash. It's one of the advantages of a reflash over a piggyback. The ECU knows you are actually running 16psi, but it has been reprogrammed to accept that as being OK.
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2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
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