Uni Dual Stage Air Filter Kit Honda Sportrax Trx400ex 99-09 Trx450r 04-05

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 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.

Uni Foam Filter Oil & Filter Cleaner Kit includes everything needed to service Uni foam air filter elements; 16 oz. aerosol Foam Filter Cleaner and one 5.5 oz. aerosol Foam Filter Oil. Cleaner's powerful agents quickly strip away grease and dirt, yet won't damage air filters; spray on, let soak in and rinse off. Filter oil traps dirt particles and will not affect airflow when properly applied.