This is an awesome post. Thanks. I have read a lot of posts on other forums presenting a variety of views both for and against. Thanks again.I would like to share a little data I have ben working on for my 2013 f150 Ecoboost. I have compared the stock air box to a K&N filter insert and an AFE CAI with and with out SCT can tune. All runs were done on same day with in a few hours from start to finish using our Dynojet Dyno.