lol, This reminds me of my exhaust thread if you took all of the sarcasm out of it....
An Eisenmann Sport or Akrapovic probably fits your calling more. Eisen is a lil' cheaper, and comes with a black series version, and seeing that you're leaning away from Akrapovic and towards Eisenmann already, I'd say go that way. Don't get race though, if cops are on your ass in the area, then it won't help you. That, and Eisen race drones noticeably more than stock.
kp, it's possible. Poor design restricting flow is possible.