Not a bad idea, but I have ran my grilles for over 5 yrs now. No covers, and it has rained on me just about every event I have went too. The Dragon, Woodward, you name it we have been down poured on without any problems. The filters Rob includes are good to go. But, it never hurts to be safe. I haven't had any drainage problems with the pans on either. They pretty well drain themselves. But after they saw the stock grille, which is pretty restrictive, I can see why they might be worried. Biggest thing I had to do was black out everything that shows thru the grille. Can't wait to get them and get them painted and installed. But, like I stated in another thread, it has to warm up a bit before I tackle that challenge.