Manufactured by Namura Kit includes 2 pistons, ring sets, pins, clips you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Kit is for standard bore size 80.00mm Size B pistons are 79.96mm Made in Taiwan Fits Polaris 800 HO models 2008 Polaris Sportsman 800 EFI HO 2009 Polaris RZR S 800 2009 Polaris RZR S 800 EFI 2009 Polaris Sportsman 800 HO EFI 2010 Polaris RZR 4 800 2011 Polaris RZR S 800 EFI 2011 Polaris RZR 4 800 Robby Gordon Edition 2011 Polaris RZR 4 800 Robby Gordon Edition EPS 2011 Polaris RZR 800 EFI 2011 Polaris RZR 800 EFI EPS 2012 Polaris RZR 4 800 Robby Gordon Edition EPS 2012 Polaris RZR 4 800 Robby Gordon Edition 2012 Polaris RZR 4 800 2012 Polaris RZR 800 EFI EPS 2012 Polaris RZR 800 Walker Evans Edition EFI 2012 Polaris RZR 800 EFI LE EPS 2012 Polaris RZR 800 EFI 2012 Polaris RZR 800 EFI LE 2012 Polaris RZR S 800 LE EFI 2012 Polaris RZR S 800 EFI 2013 Polaris RZR 4 800 2013 Polaris RZR 4 800 LE EPS 2013 Polaris RZR 800 EFI 2013 Polaris RZR 800 LE EFI EPS 2013 Polaris RZR 800 LE EFI 2013 Polaris RZR 800 2013 Polaris RZR S 800 LE EFI EPS 2013 Polaris RZR S 800 LE EFI 2013 Polaris RZR S 800 EFI 2014 Polaris RZR 4 800 LE EPS 2014 Polaris RZR 800 Walker Evans EPS 2014 Polaris RZR 800 2014 Polaris RZR 800 XC Edition 2014 Polaris RZR 800 LE EPS 2014 Polaris RZR S 800 2014 Polaris RZR S 800 LE EPS *** 2 Pistons are required for these machines ***