hydrolock is a very dangerous thing to happen, essentialy water is sucked up into your intake, if you drive through a deep puddle or something, and put into your motor, suck up enough water and your engine will sieze. a short ram intake you will not have to worry bout this, unless you like driving underwater
a CAI or the V2 from AEM both will require the AEM Bypass valve, which will allow only air to reach your motor and cut-out any water trying to enter the system.