i never had a problem previously with my CAI. Facing front behind the bumper also.. Even though i drove in heavy rain at 100km/h also not problem...
After that, checked the K&N drop-in, still dry. I think the water won't reach the engine in huge amount in once - hydroclogging. Once it reaches the filter element, it'll then dispersed and evaporated by the air going through. Same effect like water vapour injection lor..
I have removed my CAI since the fog light i installed is blocking the way (of the hose). Now i have the intake pointing downwards.. sounds garang at >4k rpm...