K&N 2018 Harley-Davidson FXLR Low Rider Replacement Drop In Air FilterK&N's high flow air filters are available as a replacement for your stock motorcycle air filter element. They are custom engineered to fit your specific application and are designed to provide low restriction and increased performance, while providing excellent engine protection for your motorcycle. Installation Instructions This Part Fits: Year Make Model Submodel 2018 2020 Harley Davidson FLDE Deluxe 107 Base 2018 2019 Harley Davidson FLFB Fat Boy