The aFe Pro DRY S performance air filter is constructed with 100% polyurethane on all four sides. This high flow "oil-free" OE replacement performance filter will outflow stock paper filter for improved horsepower and torque. Three layers of progressively finer mesh synthetic media provide maximum convenience and easy maintenance. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Integrated urethane bump seal insures tight, no leak seal over the life of the filter. This filter cleans with simple soap and water or aFe filter cleaner.