Air Filters for all ATV's. Achieve the racer's edge with DuraBlue PowerFilters. These filters are a must-have for riders who demand the highest performance from their ATV. DuraBlue's PowerFilters offer unique, proprietary design which increases air flow and air velocity. The result is increased airflow to the engine and, when coupled with jetting changes, surges in horsepower. The multiple layer filtration technology filters out heavier particles first, while finer particles are filtered in the inner layers. Stock filters gather dirt particles only on one layer, clogging quickly and starving the engine for air. DuraBlue made the first PowerFilter over 35 years ago. While many companies have tried to copy the term and their filtration design... NONE have managed to deliver both the superior filtration and the increased air volume and velocity. Improve your race performance with DuraBlue PowerFilters!