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.
So I tried something different today and started playing with the akra exhaust and found that with the new front section it's actually quieter than before and way louder with open whilst the stock is somewhere in the middle.
I'll do a full video when I get to the track but for now only a couple of quick bursts up to the speed limit.
I also converted the akra exhaust valve to be electronic operated as these engines are already low on vacuum so I didn't want to take that away what is lacking.