Should I be concerned about water / Rain getting into the filter?
Lol Where the heck are you parking your car, and for how long? At first I thought you were going to say to keep birds from getting sucked into the intake.Ditto on the Nope.
You do however need some type of screen protection to stop, small birds, wasps, etc. from getting inside the wide open hole, and building a home in there.
Oooh, the Hellcat headlight intake. Yeah, that could be dangerous to skinny people and small children. Now that you installed it, you really need to put the appropriate warning labels on your fenders.... At first I thought you were going to say to keep birds from getting sucked into the intake.