The below engine parts Cummins flexible hose 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. Hose 3899972-20 Cummins Flexible Hose 209955-20 Hose 3924052-20 Cummins Flexible Hose 209956-20 Hose 3963453-20 Hose 4004606-20 Cummins Flexible Hose 209957-20 Hose 4061202-20 Cummins Flexible Hose 209958-20 Hose …