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 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: Husaberg 390FE 2009 450FS E 2009-2012 450FX 2009-2012 570FS 2009-2012 570FX 2009-2012 FE390 2010-2012 FE450 2009-2012 FE570 2009-2012