All of our new parts are aftermarket replacements. Compatible with Minneapolis Moline Engine(s) 504 (gas). Compatible with Minneapolis Moline Tractor(s) G704, G705, G706, G1000, G1050, G1350. Compatible with Oliver Tractor(s) 2455. Cylinder repair sleeves not included. Kit includes: Pistons, Piston Ring Set, Connecting Rod Bushings, and Gasket set with Crank Seals. Kit does not include connecting rod or main bearings. All States Ag Parts Item No.