What do you think about putting exhaust stacks on my cub cadet and maybe my 154 too? I have the mufflers and the flappers to keep the moisture out of the engine when its off and stored outside. I was thinking of using a "U" shaped pipe in a lower position to gather any moisture if it does get inside the vertical pipe. I figure to put in a shutoff valve or a plug so i can open it when its parked outside to besafe so i won't hurt anything. Good idea or bad idea??? yea or nea?