Injen Super-flow Web Nanofiber Dry Air Filter | Subaru 2.0L Turbo (X-1051-BB) (X-1051-BB)With 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, Injens air filter line features state of the art designs and performance. All SuperNano Web air filters feature a proprietary media that includes a high flow base media with a highly efficient Nano membrane applied on top. This allows our SuperNano Web media to flow the maximum