Is it worth it to do CAI to a 4.0L V6? Does it really mean much in the way of performance, whether by HP or by MPGs? I'm pondering throwing one on the Explorer. Not 100% sure I'd go for it but it's definately running thru my mind.

And if I were to go for it - who's got a good product? K&N isn't high on my list because of their filters (just not crazy about them for some reason), and when I research AFE, the website's kind of strange and I can't narrow it down right, so I'm not sure I have the product I really need.