Mine's in the trunk. I have a proper mike and use the USB-C adapter with my gopro 8/7/6
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
It sounds wonderful. Next track season I'm going to put the mike in the engine bay of the E90 to see if I can capture the heavenly music from the Karbonius+cams combo
On the F80 CS I keep the mike in the engine bay. Anywhere else, even on the tow hook and an inch from the exhaust just sounds like shit. In the engine bay at least you hear the engine doing stuff