Here is the latest sound check with the rear most baffle on each side all 6 holes bored out to 3/8". I left the next baffle in intact, and I like the sound so hopefully a short 100 mile trip tomorrow to get the ECU happier with the backpressure. I still intend to get the ECU Tuned to the engine properly.
You can hear the rather expensive sounding noises coming from the transmission/clutch area.
Close to the end of the video I hold up 3 fingers to indicate the 3K RPM sound.
After boring out the holes.
AR Stage 1 Exhaust tone.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)