That sounds like a very reasonable guess. And, I got the joke. question here... Catalytic converters are expensive and the Elio won't be "required" to have one. Do you think they'll put one on there anyway? Is there a way to do a catalytic converter/muffler combo?
http://www.eliomotors.com/eastern-catalytic/What does Eastern Catalytic supply to Elio Motors?
Eastern Catalytic will be supplying Elio Motors the integrated exhaust manifold and catalytic converter, exhaust pipes and hangars, muffler, and tail pipe.