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I have just gone through the 2k break-in period with my 1M this morning and have been running a AFE p/n 54 82002 sealed CAI w/ the scoops since about the 1,000km mark... While I have yet to take it to redline (5,500 is as far as I have gone), I have jumped on it a bit, and it appears to have equal power, with better throttle response. I picked up a little bit more intake sound (turbo spool) but nothing that would be deemed annoying. Since CAI's deliver most of their increased power at the top end, I probably haven't revved it high enough to experience any gains.... It is going into BMW tomorrow to get it's break-in service completed (engine oil and rear end oil change), so after leaving there I will be sure to experience the top end of what this motor can produce.
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