Well, I just installed my Volant CAI with power core filter along with a Helix throttle body spacer. All I can say is I am very dissappointed with the immediate results. According to my Edge, my MPG didn't change at all, my air intake stayed the same or even warmer, and my MAF sensor is showing the exact same flow. The only plus I can tell to this point is maybe a little better throttle response when I get on it! Was it worth a total of $400? Hope the long term shows better results!