[discoboy1]

I am experiencing I think a exhaust drone with my 1M.
It occurs @ 2300RPM and 70 mph in sixth gear. it gets noticeably louder inside compared to going 55-60 mph.
I will try to measure with a DB meter over the week-end to see the difference, and will post results.

UPDATED**
I have taken measurements in the car driving in 6th gear from 55-70 mph,
lowest reading I got was 86-87 db, when drone is present I got peak readings of 97db.

UPDATE 2

After 2000 miles I can report the problem has not changed.

Driving on the highway, no hills, steady gas the noise inside the cabin will go up by almost 10db and disappears, then come back.
It is not a steady loud noise.....