Can anyone tell me the proper name of the covers old Big Rigs had that would cover the exhaust outlet (usually pointing up) to prevent rain and debris from entering when not in use? It would then open with exhaust flow while the engine is running.
I don't know yet, but I might want to use them in some way at some point in time....
thanks
I don't know yet, but I might want to use them in some way at some point in time....
thanks