Cummins 6CT 8.3, Engine Misc Parts, (GOOD USED) Cummins 6CT 8.3L 3918685025FACK Air Transfer Elbow Tube For Sale, 5 FACK, FACK, Elbow shape, Pulled off a Cummins 6CT8.3L, 3918685-02-5FACK, Part# 3918685 02 5 FACK, Stock # 6635 | Tested & Inspected!