I agree, I wish they had dyno charts.
I've seen on dyno about ~8 HP gain on a Mustang on one of those Saturday shows.
Gotta believe what you see there dont you?

 

I finally got my CAI. I went with the S&B. Wow, I rarely saw 15 MPG, I usually stayed around 13 to 14. Now I'm around 17 mixed Hwy and town with the Edge set to performance mode. I wish I'd have done it sooner.
I love the sound too.

 

The Mustang guys all claim a CAI is worth it, although you never see what the manufacturer claims. That being said, anything you can get helps, and the sound makes it worth it to me. Glad to see you like yours. One thing to consider: every one who says they couldn't feel a difference probably couldn't. 10-15 HP on a truck this heavy isn't going to be very noticeable to the seat of the pants. Keep checking your mileage and keep us posted. Personally I care more about getting more power than I do mileage, but to each his own. Mileage is just a side benefit to me. Good luck!