A tip for you folks using (or planning to use ) exhaust diverters.

The diverters have a NASTY habit of coming off (usually in flight ) and being lost.

Take a Dremel OR a small triangle shaped file and cut 2 shallow grooves all the way around the exhaust nipple on the muffler.
When you put the diverter on the muffler, use a small hose clamp to secure it in place instead of the plastic zip-tie.
The hose clamp wil force part of the diverter into the grooves and prevent it from falling off.