By increasing the air supply and deliver cooler air to the engine, you can improve its performance. K&N, have gained popularity aoval the world. K&N is a world leader in air filters for over 40 years. K&N air filter is made of cotton gauze, which provides better filtration and air flow as opposed to the normal filter paper. This makes the K&N filters and whole sets of K&N are ideal for exceptional engines and are also used in cars for everyday use.