PC Racing PC141 Flo Stainless Steel Reusable Oil Filter Fits: Yamaha YZ/WR 250/400/426 F 98-13, YZ 450 F 03-13, 250 99-08, XT 250 08-12, YFZ 450R 04-13, YFZ 450X 10-13, YFB 450 Kodiak 02-09, Raptor 250 08-13, YFM 400 All 93-13, YMF 350 86-13, WR450F 03-13 Made from laser cut, medical grade, 304 stainless steel micronic filter cloth, this filter provides 200 percent more filter area in many cases The Flo stainless filter catches items down to 35 microns, which is about 3 times better than most good paper or brass filters Unlike glued paper filters, the Flo oil filter pleat seam is welded and able to withstand up to 600 degrees This filter maintains consistent flow under all conditions including extreme heat, the presence of water, and cold start ups where paper filters can flow so poorly that they often cause the bypass valve to open and allow unfiltered oil to enter your engine