Hi Pete, there are only 2 types of these mufflers, one for the normal engine and one for the high compression version which runs a different head and muffler. The only way to tell the difference between the 2 is by a small hole drilled into the outlet of the high comp version.
[img]https://www.outdoorking-forum.com.au/forum/uploads/usergals/2013/08/full-6430-11897-2013_08_02_023343.png[/img]


Last edited by bigted; 02/08/13 09:41 PM.