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Put a few more miles on it, and got under the car again a few minutes ago. Checked for leaks with soapy water, checked for rubbing, tightened everything etc. Still sounds the same. At this point I think it's just normal S54 raspiness, somewhere in between a whoosh and a buzz. Wife says it sounds tinny, she's right it sounds like an e46M. Might look into something to help it, but not a big deal tbh, still sounds good just different.
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she’s home! '22 M4 Comp xDrive 
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