Not sure which 2006 Audi A4 Air Intake Systems are right for you? We have over 258 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Steven J from Hainesport, NJ said, "Ordered from AutoAnything on Thursday, intake arrived on Friday. Installed intake on Audi A4, 2.0T. Istallation took approx 1 hour, and instructions were very detailed and easy to follow. I have not noticed any fuel mileage improvements yet, but engine runs smoother at low rpm/heavy loads. Overall, a good experience."