I really appreciate your help with this. I'm going to measure my engine and lookup those part numbers and go with a pitts muffler. I looked at the hardware and saw it was really sub standard but fortunately I'm well stocked on rocket city and dubro stuff. How much expo did you use to tame the plane? I usually fly with alot of expo anyway for my 3D stuff.

Thanks again for your help. This seems to be a really well built plane and it'll be my first canard plane. Looking forward to flying this. I live in Louisiana so we can fly during the winter and I'll order my muffler and have it in the air within the next few weeks. I'll post pics and findings as I get them.

Thanks!