"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, Injen's air filter line features state of the art designs and performance. All of Injen's 8-layer cotton gauze oiled air filters feature a tightly layered media that is specified for our use, along with a proprietary filter oil that includes highly advanced tackifiers to stop as much dirt and contaminants as possible. This allows our 8-layer oiled cotton gauze air filters to flow the maximum amount of air, all while protecting your valuable engine from harmful dirt and debris. 100% cleanable with the use of our Pro Tech air filter cleaning kit – part number X-1030. Order yours today! Technology 8-Layer Oiled Cotton Gauze Air Filter, Part No. X-1112-BR, 4.00" Flange ID, 6.0" Twist Lock Base / 6.30" Media Height / 4" Top.