The below engine parts Cummins piston ring set are for the 4BT3.9/6BT5.9/6CT8.3/6LT8.9/ISDe/ISLe/ISZ/M11/NT855/ KT19/KT38/KT50/ISF2.8/ISF3.8/ISM11/QSM11 series Cummins engine. Part Name Part No. Part Name Part No. NT855 Piston Ring Set 4089810 DCEC 6BT piston ring 3802230 NT855 Piston Ring Set 4089811 4BT3.9/6BTAA5.9 3802100 NT855 Piston Ring Set 4295801 DCEC 6CT piston ring …