You would have a hard time hydrolocking unless you submerged the filter by trying to forge a small stream. "Rain" just isnt going to do it.
2014 ZL1 Speed Inc 799/751
2011 E92 DCT ZCP Stock
2009 Z06 Speed Inc Built
2008 E90 6spd ESS-Meisterschaft GT-AA Catless X-Volk TE37