Products Snowmobile- PolarisPiston Kit Back Piston Kit 09-720-03 Item number: 09-720-03 Brand: Polaris CC: 500 Bore Size: 70.75 3L/Cmm Stroke: 64 Fit on models: You May Also Be Interested In Piston Kit 09-716-04 Piston Kit 09-716 Full Gasket Kit 09-711283 Gasket - Silencer 6K8-14755-00