Sorry for what seems to be a question made by a complete ignorant... but does the PCII or PCIII alone, without any other mod, make a big change in power / performance? I thought the PC would make sense after airbox mods, engine mods, exhaust mods, etc, but alone would just tune the bike a bit better...
Anyway, i also thought that a full exhaust system would NEED the PCII / PCIII to work well...