After installing the new samson shogun pipes (without baffles), and the PCIII the bike sounds great most of the time (neighbors are a little angry but what the hell). I have noticed "popping" in addition to the rumble sound when the bike has just been started. I dont know whether this means I am running lean or rich. Once the bike has been running for a while the popping stops and the bike just sounds natural. Unfortunately the PC didnt come with a map for these particular pipes so I used the big bub straight pipes map on the CD. (I dont have access to a dyno to specially tune the bike) If anyone has tips on fine tuning the map I would really appreciate it.