Injen AMSOIL Ea Nanofiber Dry Air Filter - 2.75 Filter 5 Base / 5 Tall / 4 Top - 40 PleatWith a rich history in racing and the street performance, Injen Technology has proven itself as a leader in filtration engineering and technology. Lab tested and race proven, Injen's air filter line features state of the art designs and performance. All SuperNano Web air filters feature a proprietary media that includes and high flow base media with a highly efficient Nano membrane applied on top. This allows our SuperNano Web media to flow the