Muffler,

The stock black one works fine, it is just a bit noisier then the silver Torpedo version (CN3033-$39.95) that you may eventually upgrade to. In fact some here buy them to put on other 30's. The Silver Torpedo (CN3033) is also more of a baffled/tuned muffler so later when you want that bit extra power for 3D aerobatics you then may consider a change to it.