Originally Posted by MikeE92M3
That's exactly where I have the drone too. If I go into a lower gear and go above 4k RPMS, its gone and its all normal sound to me. Must be just the "nature" of these mufflers. Hmm.
Its what you get when you use a "generic" straight through muffler that isnt designed specifically for the vehicle..there is a reason why they are so cheap..
Dont get me wrong, I run Magnaflows on other cars and they are a good option but compared to other systems specific to the M3 that cost an arm and a leg you are not going to get the same forgiveness with drone, rasp ect