i just bought this muffler off of ebay for 23 bucks. the guy said it is a hatori muffler for the .32 O.S. heli engine. this is all he knew about it. i would like to know what model this is for and if i could use it on my .37 O.s. heli engine.

I don't know about that specific pipe but I can tell you I had to get a muffler made for the 37 to get good power out of it because it needs more expansion than any of the 32 sized mufflers I had on hand were giving it.

I saw that muffler on ebay to , it could be a older hatori muffler, i think he had it listed as a hatori muffler to.