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: KTM 125 EXC ENDURO 1998-2003 125 SX 1998-2003 200 EXC 1998-2003 200 SX 2003 250 EXC 1998-2003 250 EXC RACING 2000-2003 250 SX 1998-2003 300 EXC 1998-2003 300 SX 1999-2002 380 EXC 1998-2002 380 SX 1998-2002 400 EXC 2000 520 EXC 1999-2000 520 SX 2000 620 LC4 1999 85 SX (Big Wheel) 2003-2004 85 SX (Small Wheel) 2003-2004