Twin Air 160108 Air Box Cover Fits: Yamaha YZ 250F/YZ 450F 2014 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