Cmon Persian your a major general on this forum, which means you have over 7000 post I know for a fact that you have read about the resonating or slight drone this AA system has at 2k rpm, just like you have proven only 2 out of 10-20 exhaust systems don't have a drone, but also like you have proven those cost an arm and a leg. So that means your not going to buy any one of those because they're expensive!
Mine on the other hand is in mint condition, broken in and it's almost 50% off of list! The sound is amazing not because I said so, it's because 95% of those who bought AA say so!
So where does this leave us you buying mine for $3000, plus shipping
Or you just move on ? Let me know.