i found the K&N 63-1529 system for my '07 4.7 for $275. any experiences with these. are they worth it? any increase in MPG?

 

Same one is avaliable new on Ebay for $211 plus $16 shipping. Type in the part number. The 63 series is not CARB exempt, so if you live in California, you'll need to get the 57 series (57-1529), or the chrome 77 series (77-1529).

I can't comment on the benefits, no personal experience with this product.

Steve