The K&N Airforce Pre-Cleaner is a specially designed foam filter wrap made to extend the service interval of your K&N air filter 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 are 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.

Specifications
Wrap Type    Airforce Pre-Cleaner
Color    Red
Material Used    Foam
Inside Diameter    14 in (356 mm)
Height    4 in (102 mm)
Closed Top    No
Package Contents    1 Airforce Pre-Cleaner Wrap
Weight    0.3 lb (0.1 kg)

Product Box Height    5 in (127 mm)
Product Box Length    4 in (102 mm)
Product Box Width    5 in (127 mm)