The K&N E-3224 fits some Screaming Eagle intakes with the "D" teardrop housing. K&N air filters are designed for low restriction and increased performance, while providing excellent engine protection for your motorcycle. When the filter does get dirty, it's washable and reusable. The filter comes pre-oiled and ready for installation, letting you get out on the road immediately. It's backed by the K&N Million-Mile Limited Warranty, so all you have to think about is the ride.