Reviewed By Matthew R (Mansfield, MA) Reviewed for a 2010 Mazda CX-9 —10/2/2014 8:44 AM
Our mechanic told me the stock paper filter needed to be changed for $30. I purchased the K&N filter for 49 and installed it myself. I've used K&N on many of my cars and it did not disappoint. Once installed, I could feel the additional power and the engine sounds a lot less strained.