G'day RC34074,
well it is a muffler so it has all the heat from the engine going in it, however with the larger surface area it's dissipated over the entire surface so it's noway near ashot as the stock muffler.
Apparently the standard mufflerrunning atfull revs goes over the db threshold to be legal atclubs here in Victoria, I'm not sure about the restof Australia or O/S.
The pitts style just sneaks in and the canister is about 10% less again
Anyway the canister I used looks quite nice, the header is a little on the light side, not too sure how thatwill stand up over time.
Ithink it's about 8/10ths the sound levelof the supplied muffler.
It will build up heat in the fuse so Iwill build a three sided box with it's inside painted silver and fit it underneatheither behind the scoop or in the scoop with a cutout in the fuse.
I bought it from Wolf Models here in Australia, it was $95 Aust which is about the same exchange rate as US.
http://www.wolfmodels.net/Canisters.html
I just looked at his site and he does ship internationally, dunno what cost though. Drop him a line, Bob is his name and he's very helpful with advice, he's an old time modeler with decades of experience.
I'm starting with a 18x8 hawk prop and when broken I'll use a 19x8, both bought from wolfmodels
http://www.wolfmodels.net/Propellers.html
I probably could have bought the engine and parts from China, but I like dealing with someone who speaks my language, gives a warrantee based in my country and has telephone/email support.
Just something to think of before purchasing.
Regards Mark