Part no. RHK-0.2.28 Fitment: Kawasaki KX250F 2006-2016 Kawasaki KX450F 2006-2015 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.