Part no. RHK-0.3.67 Fitment: Yamaha WR 250F 2015-2019 Yamaha WR 450F 2016-2018 Yamaha YZ 250F 2014-2018 Yamaha YZ 250FX 2015-2019 Yamaha YZ 450F 2014-2017 Yamaha YZ 450FX 2016-2018 RHK Filters are designed and manufactured to increase airflow whilst ensuring the ultimate level of protection. RHK Filters consist of an outer layer of coarse open-pore foam which catches large dirt, grime and sand particles. The 2nd inner layer of fine open-pore foam aids in catching minute & finer particles whilst delivering maximum air flow.