FOAM AIR FILTERS: NO TOIL manufactures the world's best 2-stage foam air filters. Using only the best flame-laminated dual-layer foam bonded with the highest quality glue, they hand make each foam filter to stand up to the roughest & toughest riding or terrain. NO TOIL filters can be used with NO TOIL biodegradable "clean in water" cleaner, providing the best air filtration system in the world. Fits: Yamaha YFM250B BRUIN 2X4 2005-2006 YFM350A BRUIN (Auto) 2WD 2004-2006 YFM350A GRIZZLY 2WD 2009-2015 YFM350FA BRUIN (Auto) 4WD 2004-2006 YFM350FA GRIZZLY 4WD 2007-2015 YFM400FA GRIZZLY (AUTO) 4WD 2007-2008 YFM450FA GRIZZLY AUTO 4WD 2007-2014 YFM450FAP GRIZZLY EPS AUTO 4WD 2013-2014 YFM450FAP GRIZZLY EPS AUTO 4X4 2011-2012