RCU Forums - View Single Post - Gasser Helicopter Muffler Problem - Zenoah G23 with RJX muffler
Old 11-06-2015, 02:02 PM
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Rafael23cc
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Here's one option:

Approx 3/4 of an inch
http://www.davesmotors.com/s.nl/it.A/id.1802/.f

here are a few other options, about halfway down the page:
http://www.justengines.co.uk/acatalo...cessories.html

there may be others.
Rafael