with the headers, it's smooth, but there's a sorta "pulsing" kinda sound to it. not buzzy, raspy, or gurgly. like you mix a bit of "wuh-wuh-wuh-wuh" into the sound. but it's a very slow pulse, you don't notice it right away.
anyways, we could spend all day trying to describe exhaust sounds with words, it's not the same as hearing it. later this spring or early summer, I'll get a recording or two more of mine - perhaps a dyno recording of my own if I can