I have a 99 Silverado and have noticed that after sitting through a big rainstorm or after driving in the rain, I have some water in the bottom of the stock air filter housing(like 4 or five of the squares in the bottom filled up). I have used silicone to seal up the where the foam gaskets mate up to the box to see if that works, but obviously it didn't. Not sure if it is normal for it to suck water through the fender holes that the box mounts up too or am I maybe missing a flap that sits behind the headlights? Figured I would ask you guy's here before worrying too much. Thanks.