The Twin Air Airbox Cover prevents water and cleansers from entering your intake when cleaning the airbox. Airbox Covers are manufactured from tough, durable ABS plastic. A rubber sealing ring is provided to insure a perfect, leak-free fit. To use, simply remove your air filter from the airbox and install the Airbox Cover with the provided mounting screw. Fits: Yamaha YZ 250F/YZ 450F 2014.