2003 Chevrolet Impala 3.8L V6 Air Filter

I have had this filter on my car for a little over a year. The most important thing that I have seen is the increase to my fuel efficiency. Not to mention the fact that the increased horsepower isn’t that bad either. With that said I have to admit I was wrong and I am now a believer of the claim that K&N makes they are not some empty comment it is a fact that my wallet can prove.