Not sure which 1999 Audi A6 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:
"I now have K&N Filters in all my vehicles. The filters give the engines a nice sound of power and my gas mileage has improved about 1 mile/gallon. With gas prices to, that's about $2.00 a tank." —Aaron E from Rapid City, SD bought a K&N Air Filters for a 1999 Audi A6.