Best kit your hard earned money can buy! Here is a new top end rebuild kit for Skidoo 800R rotax twins. Kit will include 2 new pistons, rings, clips, top end rod bearings, and all gaskets needed to rebuild the top end. Brand new and ready to install. This kit has dual ring pistons, single ring is available if you would like. Size 82mm STD. Bore Email if you have any questions. KIT WILL WORK ON THE FOLLOWING SKI DOO 800R SNOWMOBILES:GSX LTD 800R 2008FREERIDE 137, 146, 154, 800RE XP 2012-16MXZ ADRENALINE 800R 2008MXZ ADRENALINE 800R XP 2009-2010MXZ RENEGADE 800R 2008MXZ RENEGADE X 800R 2008MXZ X 800R 2008MXZ X 800R XP 2009-2010MXZ X 800R ETEC 2010-2016MXZ X 800R RS 2010RENEGADE ADRENALINE 800R 2010-2016RENEGADE BACKCOUNTRY 800R 2010-2016SUMMIT EVEREST 800R 2008-2011SUMMIT FREERIDE 800R ETEC 2011SUMMIT HILLCLIMB 800R XP 2009-2010SUMMIT SPORT 800R 2011-2016SUMMIT X 800R 2008-2016PLEASE NOTE THE FOLLOWING MODELS REQUIRE SKI DOO WRIST PIN BEARING 420.8320.30: SUMMIT ADRENALINE 800R 2007SUMMIT X 2007SUMMIT XRS 2007 Also fit's other models as both exhaust gasket styles are included, the early smaller holes, and then the upgraded larger ones. Please note these are SNOW X brand parts here. Nothing to do with SPI/MCB totally different, and a lot better, see the pictures and look at the quality of these pistons for your self. Feel free to ask questions. Special end of season price for right now. These pistons were designed to be the best, upgraded with new oiling holes for added lubrication. Also included are RIK rings (only the best). FREE SHIPPING TO LOWER 48 STATES Thanks