Hello All, I'm assembling a Piper Cub ARF. The manual (which was translated from German) shows an OS 46 FX (which I happen to be using) with the standard muffler that comes with the OS.

Given that this engine has a cowl, can I/ should I use the "standard" muffler? Do people use a "Pitts" style muffler for the scale look, because of necessity (i.e. the cowl) or for both/neither?

Thanks!