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: KTM 125 EGS 1994-1997 125 EXC ENDURO 1994-1997 350 LC4 ENDURO 1993-1994 400 EXC-RACING 2000-2007 400 LC4 1997-1998 400 LC4 E 2000-2001 600 LC4 1988-1993 600 LC4 (MX) 1990 1992 620 EGS 1994-1998 620 LC4 1994 1996 1999 620 LC4 ADVENTURE 1997 620 LC4 COMPETITION 2000-2001 620 LC4 DUKE 1995-1998 620 LC4 ENDURO 1998 620 LC4 SC SUPER COMPETITION 1999 620 SX 1996-1999 625 LC4 SUPER COMPETITION 2006 640 LC4 1998-2006 640 LC4 ADVENTURE 2007 640 LC4 ENDURO 2007 640 LC4 SUPERMOTO 2003-2004 640 LC4-E ENDURO 1999-2005 640 LC4-E SUPER MOTO 1998-2002 640 LC4E DUKE II 2001-2002 660 SUPER MOTO 2003-2006