I did see a bump with the Mopar CAI. But only after I installed the hood vent. I had just the airbox on for several months and noticed no increase. Went up 2mpg after the vent was cut in.anyone noticing any kind of increase in MPG? I'm looking at the Banks intake, but I don't really care about the sound. If I can get even 1/2mpg better, then I can justify it for me.