I agree, very good engine with a lot of bang for your buck. I flew 1.5 seasons of IMAC with a Brison 5.8 in a 35% Extra. Hauled the plane with authority.

Here is the draw back...........very difficult to make quiet. If your field has a noise issue or you are going to fly IMAC this may be a problem. I worked on this issue for almost 6 months. Here is what I came up with. Because the engine is a side exhaust, you can't build a header that will stay in the cowl. It will stick out the side. If this isn't an issue, than the majority of your problem is solved. I used K&S header parts from DA. Tell them you need a flange for a King 100. Also order the largest cannister they have. I don't remember the part number, but it is the biggest on the page. If noise isn't an issue, then ignore and have fun. It is a great engine.

Bryan