Feuling FE-5415 Rain Sock (Pre-Filter) for Feuling BA Air CleanersFEULING Rain Sock for FEULING BA Air Cleaners, Black on Black logo. Fits STD 2. 500 height & SLIM filter cage M Eight, Twin Cam, Evo Rated to repel water under light to heavy rain conditions, but water may still penetrate under extreme downfall and or heavy throttle. Not designed for pressurized water and should not be used when washing your motorcycle. Fits: FEULING BA Air Cleaner, STD 2. 500 height & SLIM M Eight, Twin Cam, Evo