Ill disagree to an extent as every Hemi powered vehicle Ive owned, Ive put a piece of garbage K&N intake on and gained mpgs across the board. The power is debatable I know, but if you can make it flow more "freely" there CAN be something to gain. I dont buy into their posted numbers but this is my 4th Hemi powered vehicle, all the others have calculated MPG gains no one can argue with those facts and everything was kept the same, fuel air temps and it was over the time of ownership. However, Id agree the gains may or may not be anything at all, which is why Im waiting to see what the one guys who posted his install says about it.