Injen Oiled Air Filter 5.0in Flange ID / 7.0in Twist Lock Base / 7.9in Media Height / 5.0in 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 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