Thanks. There is Absolutely no drone. I made a video from the inside also if that will help you. I think I put it under rpi f10 exhaust on YouTube. ubtrippin is my screen name.
2013 Bmw M5-Alpine White/Black-Oem gloss blk powder coated wheels-Expel clear bra-35% tint-Rpi Gtm Exhaust-Rpi Downpipes-Rpi Scoops-Hr springs-562hp/524tq