Part no. RHK-0.1.08 Fitment: Honda XR250R 1986-2006 Honda XR350R 1983-1985 Honda XR400R 1996-2006 Honda XR600R 1985-2002 Honda XR650L 1993-2016 "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."