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 and toughest of any style of riding or terrain. These filters, used with No-Toil foam filter oil, provide the best air filtration system in the world! (Remember: NO TOIL oil washes clean in water and is 100% biodegradable; dirty water can be thrown down the sink. You do not need to use harmful petrol or kerosene to clean your filter. Fits: Husaberg 450FC 2005-2008 450FE 2004 450FS 2004 450FS C 2001-2006 450FS E 2001-2003 470FC 2001-2002 470FX 2001-2002 501FC 2000-2004 550FC 2001-2002 2004-2008 550FE 2003-2008 FC/FE 650 2004 FC450 2001-2004 FC550/6 2003 FE450 2005-2008 FE450/FEE450 2001-2004 FE501 2000-2005 FS450/FS-C450/FS-E450 Motard 2001-2004 FS650 Motard 2004 FXE450 2001-2003