Whoops,

I made a mistake Bob it is not a Bisson muffler it is a slimeline, The exhaust pipes go all the way to the back of the can with holes drilled in them creating baffles and the smoke nipple is attach to a heating coile that retains a lot of heat, If you go to Slimline web site and look up the inverted wraparound pitts muffler for a DA 50 you will see the heating coil that Im talking about they show it out of the muffler.

My mistake do to the fact that I have three pitts stile mufflers, Slimeline the best one J tec and a Bisson so I got them mix up, Ahhhhhh,