3" eh.. I'm running the Nameless 4-2-1 header in 3" going to their 3" downpipe (with helmholtz resonator) mated up to the 3" Perrin resonated, catted catback. It sounds like a racecar when you get on it.
Overall I think it sounds badass and I love it.
I can try to get some sound clips one of these days soon if you want.