Maxima Racing Oils MTX-2401-00 ProFilter Premium Air Filter Yamaha M/C YZF 250 01-11/YZF 450 97-09/WR 250/400/426 97-02/YZ 125/250 97-11 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