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2006-2013 KTM 990 Superduke (Pre Cleaner) Uni Air Filter Dirt Bike #NU-1416ST

2006-2013 KTM 990 Superduke (Pre Cleaner)  Uni Air Filter Dirt Bike #NU-1416ST


  • The principle 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, allowing the entire thickness to be utilized
  • This prevents surface loading or air restriction for 80% of the surface life of the air filter element
  • When the filter is sufficiently dirty it can be easily washed, re-oiled, and re-used