I think I'm just being paranoid. It's definitely there, but may just be the intake and exhaust giving out noise at the same time. Really only hear it with the windows down and noise bouncing off of buildings in town.
Maybe it's a slight exhaust valve rattle. I do keep it in Sport+ all the time. But then I would think it wouldn't go away at higher revs.
I'm sure it's nothing to be concerned about.
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