You do understand that in order to suck water all the way up from the filter of a CAI, the filter will have to be almost entirely submerged. If not, you'll just get mist and still get more air from the open spot. People that hyrdolock state their conditions were in as what 27IVTEC said, in standing water... and it was DEEP standing water... enough to throw water all around the filter if not submerge it 80-90% into water. If you live in Florida, its understandable since it does rain like crazy and heavy over there. But I live in the bay area of CA and its been raining pretty constant for about 2 weeks and I have a CAI with an open foglight hole AND no underbody shield. Till now, no signs of hydrolocking(bogging, missing, lack of power). I even pulled off the filter and the inside of my piping is still clean along with the MAF. If you're really really worried then get a bypass valve but unless you like going mudding or live in an extremely rainy area, you shouldn't have any worries.