Maxima Racing Oils MTX-1003-00 ProFilter Premium Air Filter Honda M/C CRF 250R/X 04-09/CRF 450R 03-08/CRF 450X 03-08 Reusable long life air filter with permabond ultra high strength seams Heat laminated, dual-stage, chemical resistant, polyester-based reticulated foam 15 millimeter high flow filtering thickness and plush 13 millimeter sealing foam Low profile rubber grommet and packaged individually in a resealable bag