Piston +.020 / Kohler 47 874 04-SPack Size:1Kohler 47 874 04, Kohler 47 874 04-SESF 163-358, Foley/Belsaw 5979729, Foley/PLP 163-358, Green Meadow P358, Prime Line 7-03813, Rotary 6747, Sunbelt SB-6747Kohler K241, K482 and M10Ethanol: Not compatible with greater than 10% ethanol fuel, Cylinder Bore Size: 3.271"