I've got Clifford headers running into regular old mufflers. But, in front of the mufflers I've got a set of quick time performance electric cut-outs. Quite when you want to be and then loud as all He** when a noisy honda pulls up.

My $.02


1953 3600 w/ full pressure 235
"Quando Omni Flunkus Moritati"
--If all else fails, play dead.