haha i havent. and mine a a single stack 12 valve straight. its wakes up the neighborhood 
i dont think a muffler is going to help clear any smoke, they just wont hear you cumming from as far away:lol3:I havnt had any trouble with cops but a fiends of mine with a CR got a ticket and just put a straite through muffler on it. i'm considering a muffler to help out with the smoke i'm putting out. Its past the point of being cool/fun. Its straite up rediciolous how much i'll put out.