Fair.  It depends on the output of the turbine they might use.  Various articles about Jay Leno&#x27;s EcoJet car also says that they were looking into ways to add an &quot;intake&quot; muffler, also citing that the Chrysler turbine car seemed to manage to quell the intake noise.<p>Totally valid concern, but I&#x27;m sure they&#x27;d be able to manage to quiet it down enough.  If it&#x27;s quieter under braking than typical semis that use jakebraking, it could be a win.