Product Overview
4955566 5259499 ISB QSB Rear Crankshaft Oil Seal. Product type: Rear Crankshaft Oil Seal. Part number(s): 4955566, 5259499. Engine/model: ISB, QSB, 6BT. Application notes: rear crankshaft oil seal for Cummins ISB, QSB, 6BT engine applications. Please verify final fitment by part number, engine serial number, and application before publishing or ordering.













