... and installed it today.
the first thing that I notice is that the sound is bit more throatier, but not much louder, which is nice. if the accelerator is gently applied, once could cruise through city really without any heads turning. even if the "pedal to metal" approach supersized, one gets deeper, throatier sound, but nothing repulsive loud. thumbs up!
the second thing one notice is the response in the mid rpms. can not tell how much faster it goes, but the feeling is that is dong just fine when filtering through city.
third is the highway, unfortunately, I had only limited opportunity today. will update this comment once have more experience.
the fourth is that in low rpms I really do not see much of an improvement, but maybe this requires ECU learning curve.
was real fun to play with this! next serious tuning effort will be the exhaust. sound-wise, my preference is with DAM from Belgium, but for MP3 it would need to be custom made. also like the idea of using universal sport direct flow through muffler, just need to find one which is street legal.