UNI Filter NU-8601ST Air Filter Fits Arctic Cat ATV

UNI Filter NU-8601ST Air Filter Fits Arctic Cat ATVUNI air filters. The principal of how foam air filters work is simple: "Open Cell" polyurethane foam is wetted with specially developed filter oil. The "sticky" filter oil is suspended in the path of the dirty air on the strands of the web like cell structure of the foam. This makes it impossible for the dirt to pass through the strands. As the outer strands become loaded with dirt particles, the wetted strands down stream start trapping dirt,