Product details:

The K N Airforce Pre-Cleaner is a specially designed foam filter wrap made to extend the service interval of your K N Filtercharger when used in very dusty conditions. The Airforce Pre-Cleaner is designed to be cleaned with K N Cleaner or soap water. Red colored Airforce pre-cleaners air oiled with K N air filter oil after they are cleaned. They are made from large, open cell foam. Gray colored Airforce pre-cleaners do not use oil. They have smaller foam cells. The K N Airforce Pre-Cleaner is a specially designed foam filter wrap made to extend the service interval of your K N Filtercharger when used in very dusty conditions. The Airforce Pre-Cleaner is designed to be cleaned with K N Cleaner or soap water. Red colored Airforce pre-cleaners air oiled with K N air filter oil after they are cleaned. They are made from large, open cell foam. Gray colored Airforce pre-cleaners do not use oil. They have smaller foam cells.