I have a Ford F150 2014 with the 3.5 ecoboost engine. I could tell the difference right away. throttle response and mileage is better. Con, the install. The tubing they include does not fit very good and I am not real comfortable with how it fit. Would not get this unless they get that issue addressed. I did have this on my 2010 f-150 with a 5.4 and had no problem.