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: Kawasaki MULE 2500 1994-2000 MULE 2510 1993-2000 MULE 2520 1993-2000 MULE 500 1991 1993-1996 MULE 520 2000-2001 MULE 550 1997-2005 MULE 600 2005-2015 MULE 610 2005-2016 MULE 610 KAF400 4WD VIN JK1AFEA1 9B547191 and lowe 2009 MULE 610 KAF400 4WD VIN JK1AFEA1 9B547192 and abov 2009 MULE 610 XC Big Foot 2016-2017 MULE SX 2021 MULE SX XC 2017-2021