OEM Replacement – Direct fit for Honda CRF250R (2004–2009) / CRF450R (2003–2008) Perfect Fit – Exact match to OEM Part# 17213-KRN-850, 17213-MKE-A50 specifications Washable & Reusable – Long-lasting dual-foam design for off-road use Easy Installation – Drop-in replacement, no modifications needed Factory-Spec Filtration – Maintains original airflow and engine protection