If you want you can also use a cheap roof baffle from home depot to seal the area where it goes inside of the fender. I have a similar setup, but yours looks a lot cleaner, nice job!

Anthony, I've had my FWI on my 05 for two years now, the filter is just starting to get a little dirty, and I drive through deep puddles and on dirt roads every week. If you're really concerned, use a little weather stripping to better seal the fender.