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I have the M-Perf exhaust had I noticed that to be true and more prominent sound with the ASD on. I coded ASD off this past weekend and found that the drone in-cabin noise dropped considerably. I use the regular 2-bar performance option (Sport) when driving, and am familiar with the RPM range you stated. I'll have to try and maintain it to see if I can hear it with the M-Perf exhaust too.
Unfortunately we got 30+ inches of snow. It may be a few days before I can provide more details.
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