As the leader and originator of the high flow performance air filter, K&N constantly looks for new ways to provide excellent protection and maximum power for your car, truck, motorcycle, and just about anything else with an engine. Many of these podcasts explain the science behind air filtration including the direct relationship between airflow restriction and performance. After listening to the series of chapters from our audio book you will realize that it is easy to get more power and efficiency from your vehicles with the right air filters or air intake systems. K&N has manufactured performance air filters and air intakes for cars, trucks, motorcycles, ATV's and more since 1969.