Not sure which 2009 Acura TSX Air Filters are right for you? We have over 14810 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&N filters are the best on the market as far as I am concerned. I switch the stock air filter for K&N on all my vehicles within days of my new vehicle purchase. The exact replacement fit make the K&N an easy replacement and the difference is very noticeable in the performance arena. I even have on on my Yamaha FJR1300. Spend a few extra bucks and get better performance and long term savings. You'll be hard pressed to find a better air filter." —Mack E. M from Apo, AE bought a K&N Air Filters for a 2009 Acura TSX, 2.4L 4-cyl. engine.