The Yellow Dragon over at Joe's muffler shop.

Joe put the exhaust together. It was the first professional exhaust I've ever seen on a homebuilt hovercraft. This turned out to be both compact and extremely quiet. That's just a glass pack, but it's on the "quiet" way and it really shuts down the engine noise. The primary noise on this thing is the props, and those are quieter than most hovercrafts. I'm gonna do it this way.