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Showing content with the highest reputation on 07/09/2022 in all areas

  1. Upping the boost doesn't matter as long it's from the result of the tune and not mechanical, i.e. no external wastegate, manual boost controller, etc. Tunes are very difficult to police so it's pretty much whatever, unless of course you are running a tune that isn't pump 91-93 ish, but e85 or similar. Then that would bump you out of Street touring entirely unless flex fuel was an OEM option out of the factory which I don't believe your BMW would fall under.
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