Not sure which 2010 Audi A4 Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"K and N make a great product and since the filters are for basically the life of the vehicle you save a lot of money over time. I can't attest to the H/p gains but the engine does seem to breathe better which is good." —Earl S from Washington, DC bought a K&N Air Filters for a 2010 Audi A4, 3.5L V6.