My setup does drone quite a bit from 1500-2000rpm.
I have plans to make a new 3'' setup with resonance chambers.
But my setup sounds real good, keep getting people telling me how good it sound.
Yet its not too loud. perfect street setup. Just needs to get the drone reduced.
Personnally i dont like the load muffler anymore, i grew out of that i guess lol.
F10 550i Xdrive M sport, white
trade-in 2008 E90 M3