Air filters have to strike a delicate balance. On the one hand, they have to filter out debris and whatever else could find its way into your engine. On the other, they have to be porous enough to allow for the necessary airflow to get to your engine. BBK Air Filters are designed to strike just that right balance. With multiple layers of filtration material through which air must pass, the majority of dirt and debris does not stand a chance of reaching your engine. At the same time, BBK Air Filters keep the necessary air flowing to your engine, never allowing it a chance to back up and build up pressure that would hinder engine performance. It is recommended for you to change your air filter every three to six months. Meanwhile, check it every time you change your engine oil, as you could collect more debris than you realize and may have to change the filter even more (or less) frequently. It will be obvious when the filter needs to be changed. BBK Air Filters are an economical way to not only ensure proper engine performance but to also improve fuel economy. Over time, they may even pay for themselves. Motor enthusiasts always want great service while buying dependable auto parts. For all our customers, we established a 24/7 customer support call center to support you with your questions. Everyone hates paying for shipping, so you always get FREE shipping on every order $50 or more. If you find a better price, let us know - we will meet or beat any advertised price for auto parts.