Complete top-end compatible with all Yamaha Rhino and Grizzly 660 models and years102mm big bore ALUMINIUM NIKASIL PLATED cylinderNikasil plating can be redone at 102mm over and over for the life of the cylinder, no more boring or sleevingNikasil has more lubricity and less friction than steel, leading to a more efficient running motor, longer piston ring lifeNikasil dissipates heat better than steel, keeping the engine running coolerWossner or Wiseco forged 102mm pistonNitrite-coated piston ringsChrome wrist pinsCirclipsHotcams Mudbuster camshaftHD cam chainBillet cam chain tensionerTalon TITANIUM cylinder head stud kitTop end gasket kitCometic big bore head gasketRuns on pump or race gasNo mods of any kind are required to use1-year warranty*