had the intake on my 2010 ram hemi for about a week now. So far no difference in gas mileage, no difference in lower end power( under 2500 rpms)above 3000 rpms i notice a bit more power. Alittle more sound to the engine but really dont notice it unless u stomp on it. Install took 20 mins very straight forward. I have the airaid mxp system w/out intake tube, so havin stock tube mite be a bit of a hiderence to the system. Overall a good product for the price..