K&N High Volume Air Filter System I just installed a K&N High Volume Air Filter System on my 2004 5.4L Expedition. It's was suppose to increase power by 30HP and improve gas mileage. I'm not sure about Horsepower since there's no pratical way to measure that but my mileage has improve by 1 and sometimes 2 miles per gallon. I can feel a little more power especially during accelerations but like I said, no way to know exactly how much more.
Anyone else have similar or not so similar results???? Thanks for writing back, just interested to hear what others may have experienced. |