Anything that would be close to your OEM snorkel, which should come out right by your gas tank by the front of the seat. Check where all of your vent tubes and snorkels (air box, transmission breather, brake vents etc...) come out. As long as your not that deep you don't need to worry about it. I've got mine snorkled mostly for safety just in case I hit a hole sometime, okay okay so I like to play in the mud so sue me.

Actually I really don't go deeper than the guys who don't have snorkels, I just like the insurance.