Jonahs is correct on the filter situation. You can snorkle it or run it with the dry sock that goes over filter to keep water out on rainy days but, everyone I talked to said they do not even use it for rain with no problems.
But, like Jonahs said about where the turbo is so high up in frame you would have water in the Cab before You got turbo under water. I could see where the dry sok would help allot in the desert or dusty conditions more than water situation.
TAZ