First update - development of the exhaust is almost completed:
Here you can see the electric valve system:
These will be my exhaust tipps (Nikel with titanium coating, double wall with insulating fiber inside, black).
They were designed and developed based on my individual preferences.
They've also developed pipes for a cat removal version. I won't need them because in Germany it would be illegal (so I will keep the cat) but maybe for some of you that could be interesting.
I expect to get a first sound video tomorrow. Stay tuned!