Droning / Humming noise when accelerating

[SnowmanJPS]

Kind of sounds like lugging but shouldn't be lugging at 2k rpm

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[geonerdist]

I had mine at the dealership for hours yesterday. Mine has an obvious drone/vibration when accelerating through 2000 rpms until about 2500 rpms. It only does it when it’s warm and in motion. They are baffled. The only thing they noticed was a correlation between the waste gate opening/closing to the drone starting and stopping.

I have one of the axle dump exhaust tips. We decided to put the factory tailpipe with resonator back on to see if that changes anything. Then take it back if it still makes the droning sound.