The XYZ engine has the same exact muffler bolt pattern as the DLE, so yeah, a pitts muffler for it is no problem. Not only is it no problem, but just tell Tom Denny at Valley View which orientation muffler you want and he'll ship the motor with that muffler for you. J'tec makes really nice mufflers for these engines, I've heard they are a little more substantial with nicer sound. When testing the XYZ engines, Tom says he put one on the test stand at WOT and left for an hour or so. Came back and it was still happily screaming it's guts out.

Funny that crank pin let go when it was idling. Obviously the damage had already been done, good thing it didn't let go at high rpm's though.

Ernie Misner