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 09-715 Piston Kit 09-723-03 Piston Kit 09-713-01 Double Gasket (0.6MM) 420-831-021