Using only the best flame-laminated dual-layer foam bonded with the highest quality glue No-Toil handmakes each foam filter to stand up to the roughest and toughest of any style of riding or terrain. Note: No-Toil air filters 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. No Toil oil is 100% waterproof - until water is mixed with No Toil cleaning crystals). Fits: KTM 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