Anyone have any experience with this intake system? I put one on my 2007 and according to the overhead computer I lost mileage. Is it the overhead computer and just my imagination?

 

Try using hand calculations and see what you come up with. Most of the time, my 1500 comes up with crap that is no where near what I see on paper. On another note, you should have gotten better mileage with the intake. Mine actually got around 2mpg better.