Kuryakyn Air Cleaner Pre-Filter Corsair Hi-Performance Kuryakyn uses only K&N and aFe oiled gauze filters in our air cleaners which, when properly maintained, are water repellent Even so, there may be times you wish you had a pre-filter to keep bugs, dirt, wash water, or a torrential downpour out of your air cleaner Made exclusively for us in the USA by Outerwears Water repellent, UV resistant and filters debris down to .005in