Try driving a rotary without a muffler!
I used to get kicked out of every track when I had headers,then I switched to a turbo engine and it got "tolerable"....but still,thats a loud little engine.These days,I keep it subtle with a rotary spec muffler.
Im gonna ditch the Yosh on the B4,its just too loud and raspy,like most of the early 90's era muffs.