All of our new parts are aftermarket replacements. Compatible with Perkins Engine(s) 3.144 (Diesel, 3 cylinder). Replaces Ford OEM Number(s) 957E6102B, 957E6102C, 81803864. Replaces Perkins OEM Number(s) 55274. Replaces Massey Ferguson OEM Number(s) 739845M91. Piston rings not included. All States Ag Parts Item No.