If you're thinking about a CAI and are worried about getting water on the filter this inexpensive product should help.
http://jlttruecoldair.com/ZenCart/index.php?main_page=product_info&cPath=357_358&products_id=518&zenid=ag1k0kok5sj1efljefub2qta01

http://jlttruecoldair.com/ZenCart/index.php?main_page=product_info&cPath=357_358&products_id=518&zenid=ag1k0kok5sj1efljefub2qta01