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: Polaris RANGER 800 2011-2014 RANGER 800 EFI 4x4 2011 RANGER 800 EFI MIDSIZE 4x4 2013-2014 RANGER 800 FULL SIZE 6X6 2011-2015 RANGER CREW 800 2010-2014 RZR 800 2008-2009 2011-2013 RZR 800 Built 1/01/10 and after 2010 RZR 800 Built 12/31/09 and Before 2010 RZR S 800 2011-2013