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10-25-2019, 12:58 AM
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#118
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Private First Class 
Drives: 2023 540i XDrive
Join Date: Sep 2016
Location: USA
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Quote:
Originally Posted by bimmer456
Maybe there is a turbo boost function. Also there was a firmware update that restricted power to meet emissions. The earlier cars had closer to 400 whp.
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Still dont believe it
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