Maxima Racing Oils AFR-2005-00 ProFilter Ready-To-Use Air Filter Yamaha ATV YFZ450 R/X 04-11 Bonded dual-stage open cell foam matrix with 6 millimeter outer foam and 10 millimeter inner foam layer Washable and re-useable, with high strength glued seams that won't fall apart Pre-oiled with Maxima FFT filter oil Complete with disposable gloves and packaged in a resealable bag