SOOOO, i threw up a video on instagram the other week of the exhaust at WOT. Carven then DMed me and asked about a whistle i had after 4500rpm. I explained its always had it and never thought much about it. Well apparently they have had issues with the muffler they used in this system and ended up switching to the R type muffler.
They are sending me a new system under warranty, with a return label to send me old system back to them.
If it shows up this week, thats is some of the best customer service i have ever experienced