[This K&S tuned pipe from probuild will be inside my Mig.3 fuselage to keep the model's clean scale lines, boost midrange power, and give good silencing. With a 55cc 3W motor up front I wanted to make sure that as little of the potential heat as possible escapes the skin of the pipe so (with a little help from a friend) I sewed up this Nomex sock to surround the pipe ! Almost no weight and fireproof.
If you watch it long enough it moves ...