- Inverted top plate with pleated side to maximize airflow - Black synthetic high performance air filter element with built-in velocity stack - To service just clean and rinse filter element - Do not oil filter element - Offers increased leg room - Complete with installation hardware and gaskets. Note: See 590442 for optional rain sock. See 960388 for the replacement air filter element 16-17 Softail 11-17 CVO Softail 2017 FXDLS 08-16 Touring Trike. (e-throttle) (NU)