RE: Correct slimline pitts muffler for OS .55 AX
This is the brand new OS 55, right? They may not have a specific listing for that, but if I recall, the OS 46 and OS 50 are basically the same and from what I read, the same falls true for the new 55. So, the one listed for either the .46 or the .50 may work. This is only my opinion, I have both the OS .46 and the OS 50 and everthing seems to be interchangeable except, of course, for the internal parts.
DS.