The below engine parts Cummins crankcase breath 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. GASKET,BREATHER 3999820 Crankcase breather 3933548 ELEMENT,BREATHER 4011521 Crankcase breather 3968382 BREATHER,CRANKCASE 4095790 Crankcase breather 2830405 BREATHER,CRANKCASE 4100596 Crankcase breather 3864201 TUBE,BREATHER 4100767 Crankcase breather 3966164 BREATHER,CRANKCASE 4371866 …