The whole exercise was to get rid of 90% of the rasp all m3's have, have a low rpm rumble and get rid of the horrible noise these engines make on lift off.
I like the v8 sound but not the cabin resonance.
I got another Idea to make this sound car even sweeter which should allow me to run the akrapovic rear section but I got my eye set on a new titanium exhaust from agency power, I got to finish modding the mid section and everything has to be interchangeable between factory/aftermarket sections so one can play and get the exhaust note just right.