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Seems like BS to me, even on a custom tune I would doubt it. Dyno settings are easy to manipulate, so trusting a dyno sheet is pretty dumb.
edit: a Quick search shows that OV tuning did get 27WHP out of a stock M20A Corolla though on a custom tune.
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2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc.
2015 X5 35i Xdrive
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