Taking the end cap off and looking inside it appears to be a straight shot right through the can, with only the huge spark arrestor in the way. Is there something inbetween the header pipe & silencer, in that flanged area right before the silencer that I can't see, internal baffle or something? Just curious. I have read all the exhaust posts in the archives. Just seems like there should be an easy way to slip a different core in there and add some packing perhaps? Just thinking. I thought if nothing else that spark arrestor could be cut down by half and get rid of the solid end piece.