Part no. RHK-0.11.08 Fitment: Husaberg FE 390 2010-2012 Husaberg FE 450/570 2009-2012 Husaberg FS/FX 450/570 2010 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.