Acquired this engine for a !/3 scale Pitts. Lost interest in the project and never finished it. I have not ran the engine but it has great compression and smooth bearings. Plane is also available------------.JUST DISCOVERED THE PITTS STYLE MUFFLER DOES NOT FIT THIS ENGINE. PORT SPACING IS TOO WIDE ON THE MUFFLER. MUFFLER WOULD NEED TO BE CUT IN TWO, A SECTION OF THE CAN REMOVED. THEN WELDED BACK TOGETHER.