Not sure which 2009 Ford Mustang Air Filters - Custom Fit is right for you? We have over 12082 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:
"At first I noticed a slight increase in power on take off. I did not expect to actually notice any power increase like the add says but I did. I could hear the intake when accelerating, it sounded like the engine was getting more air. So far I really like the product and I am pleased to finally purchase a product that does what it says it will do. I plan to check gas mileage next, hope to be suprised there also.I am planning to buy another one for my wifes' car." —Dan B from Wichita, KS bought a K&N Air Filters for a 2009 Ford Mustang.
"I can feel the difference after installing the K&N filter." —David R from Itasca, IL bought a K&N Air Filters for a 2009 Ford Mustang.