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: Kawasaki KLX400R 2003-2004 Suzuki DRZ400E 2000-2012 2014-2022 DRZ400S 2006-2016 DRZ400SM 2005-2022