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      02-01-2014, 11:42 AM   #75
mr-karim
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Quote:
Originally Posted by Joey.Lee@AlexanderBMW.com View Post
From what I've seen, the "PRESS-TUNE" you actually loose HP proven on the dyno at EAS dyno day on both F10 M5's by 10-15hp.
How would you lose hp by adding 2.5-4 psi?
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