The OP is sharing a bad experience he had with the Volant CAI, not Airaid. The Volant is not designed to be used with the lid off, especially during inclement weather, as it does not seal to the hood like the the Airaid. So this is what I learned from the OP, if you have a Volant CAI and you take the lid off for the sound and it starts raining, put the lid back on "ASAP" or you might have a problem with water ingestion.