Reviewed By Igor S (BROOKLYN, NY) Reviewed for a 2009 Mazda CX-9 —3/27/2012 8:24 PM
I bought K&N Air Filter and installed it right away. Installation is even easier than original because it is thinner. I don't drive this vehicle so much thats why I can't say about economy of the fuel, but horse power added significantly. So I think with a quiet ride fuel savings will be noticeable.