As Earl said the spark plug is a no name but since it comes with a RCXEL ignition it is more than like;y made by RCXEL. I dID HAVE A Giles 202 a few years ago but I sold it to a friend who sent it to the fly gods in the sky. i HABE THIS ncg gt17 MOUNTED TO MY Seagull Cap 232 and it mounted right to the holes I had drilled for the Old ASP 91 I took out. This engine is a little longer than the ASP so the prop spinner sticks out a lillte more thanb it did with the ASP 91. The plane balance perfectly with this engine with no added weight anywhere. Here are oa few pics on the installation.