One significant difference between the Enya 09 IV and previous versions is that they moved the exhaust stack to the other side. Because of this, sometimes it is not just a drop-in replacement. George
That is true, George.
AFAIK, the IV muffler will still fit the III. But I found it to be an advantage to my OK Models Pilot 30" Cessna 177 Cardinal semi-scale build with inverted 09-III. It puts the exhaust outside the circle.
