Mike,

The bypass and exhaust pipe are from Trim Aircraft. I used the slightly larger bypass intended for the KJ-66 type turbines just in case I sell the model down the road. (This way it would be easy to convert to either type engine.) Although it is slightly larger there is only about 5/8" clearance all of the way around the turbine. (Very nice bypass and dual walled exhaust pipe from Trim, by-the-way!!! Bypass is carbon fiber and the pipe is light yet very adequate.) I don't have the dimensions handy. I'll have to get them tomorrow. There is no bellmouth on the pipe. The pipe slides into the rear of the bypass for a tight, seamless, fit. If Ed or Kevin is monitoring this thread perhaps they could share some of the dimension #'s. This Trim Sabre is a very good kit and is a great value.

Kevin