There is thread you will want to check out. It's about the cowl water deflector

http://www.grandprixforums.net/threa...ent-Fix/page29

This one sums it up in 1 page with relevant pictures/about halfway down.....part is super cheap and get a cabin filter while you are in there.
$20 and you have 2 rock solid investments

http://themustangsource.com/forums/f...ntimes-489107/