AIR FILTER RTECH HONDA CRF250R 18-21 CRF250RX 19-21 CRF450L CRF450X 19-ON CRF450R CRF450RX 17-20The Rtech Air Filter's design, high quality materials and superior construction deliver unbeatable performance and protection Rtech filters are designed to increase airflow while ensuring the highest level of protection from dirt dust. Coarse open pore foam catches airborne dirt, grime and sand. Fine open pore inner foam acts as a second filter to trap the smallest particles while ensuring maximum air passage. Exclusively formulated adhesive ensures