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: Suzuki LTA500F QUAD MASTER 4WD 2000-2001 LTF500F QUAD MASTER 4WD 2000-2002 LTF500F QUAD RUNNER 4WD 1998-2000 LTF500F QUADRUNNER 2001-2002