Maintaining and improving your engine performance requires 3 components: Spark, fuel and air. The easiest way to get more performance out of your engine is by helping it breathe better with some simple bolt-ons like air filters and exhausts. A clean performance air filter or cold air intake system can improve the responsiveness, fuel efficiency and also peak horsepower and torque of your car or truck. Vehicle air filters come in different configurations and price points - so research and talk with an air filter specialist to find one that suits your needs. Modern truck and car air filters come with dozens of accessories to improve and maintain your air filter - read on below for in-depth review of car and truck air filters. Check out our Air Filter Car Buying Guide
Not sure which 2011 Ford Focus 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:
"I've used K&Ns on my motorcycles for years; when I saw the prices for throw away filters I thought, why not go to K&N for my car & truck? It costs only about 2.5 times as much as the disposable filters; the K&N will require service far less than the others, and the vehicle breaths better. Especially if you keep your vehicles long like me, it's an easy choice." —Dave G from Lake Jackson, TX bought a K&N Air Filters for a 2011 Ford Focus, 2.0L 4-cyl. engine.
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