Injen AMSOIL Ea Nanofiber Dry Air Filter - 3 1/2 Filter 6 Base / 6 7/8 Tall / 5 1/2 TopWith 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