K&N E-3745 - Air Filter for K&N Black Universal Air Filters are made from Dryflow oil-free synthetic media. These low restriction clamp-on air filters are designed and manufactured for a wide variety of applications. When dirty they can be easily washed using K&N synthetic air filter cleaner. High air flow with excellent filtration Oil-free air filter Black synthetic media Washable and reusable Using cotton gauze instead of typical folded paper, our filters increase airflow while providing excellent engine protection. Custom-engineered tubes deliver better airflow than you get with a stock intake. More air means better performance. Helps capture most mold, mildew, fungus, spores, bacteria, germs, pollen and allergens, and helps to rid the air of unpleasant odors.