I have a bone stock M2C, only thing done is a GTS lighter hood. I did switch out the stock air filters and replaced with K&N, you can hear the turbo more and maybe gave me a tiny bit more power since the filter isnt as restrictive as before.
Sadly the sound is abit off, even with the valves open, theres no crackle/burble either on decel, not that I'm a fan of those burbles. I guess its good enough, acceleration especially after 100mph is spot on. IRL in Mexico when I took this car passed 120mph I was surprised with the legs the car had for a 400hp car. It got to 160mph pretty easy. Feels faster than the '13 Mustang GT I had which was also stock.
Now that I think about it, I'm going to **** with my brothers and take pics at laguna seca. They'll think I actually went to a track day on thanksgiving day. LOL