Maxima Racing Oils OFS-2001-00 ProFilter Stainless Steel Oil Filter Fits: Yamaha YFZ450 R/X 04-11, WR250/450 03-11, YZF250/450 03-11 Protect the oil that protects your investment by running a ProFilter stainless steel oil filter Built from the finest materials, ProFilter stainless steel filters are built to last long after standard oil filters; simply clean and reuse Swiss made stainless steel micronic filter cloth filters particles as small as 35 microns with increased flow Constructed with billet aluminum end caps ProFilter stainless steel filters exceed all OEM specifications and are safe for use with synthetic or petroleum based oils