F150 Air Filter KN replacement  high-flow filter is the original high-flow filter.  Since 1969  K and N has been designing and manufacturing high-flow filters for the automotive and truck enthusiast who is interested in gaining the maxim horsepower and acceleration from their Ford trucks.  K & N filter  has designed and manufactured over 2,400 High-Flow air Filters that fits most modern trucks and passenger vehicles. And has over 500 different  K & N High-Flow  Intake filter Systems that fits your Truck and other vehicles driven by Ford enthusiast minded drivers. K & N air filter has more Ford truck applications than any other manufacturer of any similar air filter or products. And by only cutting edge research and development can K & N air filters do this do our  trucks. There are on top of the air filter game and intend to stay there with additional R & D.  K&N air filter was the inventor of the High-Flow air filter category and the High-Flow Technology that supports  their company along the new products that are coming for the newer more fuel efficient and powerful Ford trucks that will need a top of the line air filter to maintain the performance standards . K & N air Filters also makes thousands of racing and specialty type air filters and K & N is the only air filter used at the Indianapolis 500 Race.