Accessories and Replacement Parts, High Flow Filter Kit with Two Pins, 1″ (2.5cm ) Taller The easy-to-install S&S Stealth air filter kits are designed for riders who like to go fast, but want to stay stealthier. Get all the performance of the S&S design, including the directional air “stinger” cone in the filter, and hide it under your Harley-Davidson's stock air cleaner cover for more power. No one else will notice the improved performance, because your bike still looks completely original. This is what you call a “sleeper”! The S&S Stealth air filter offers 38% more airflow. To reduce heat transfer to the intake air, these kits feature a high-strength synthetic polymer backing plate, a washable cotton gauze filter element, and stainless steel hardware. NB as professional sellers we can i.