Cummins ISC, Engine Misc Parts, (GOOD USED) Cummins ISC 3967749REV00FACK Air Transfer Elbow Tube For Sale, Intake Elbow off a Cummins ISC Engine, Cobra shape, 3967749 REV 00 FACK, FACK, FACK, JG3220, Part# 3967749-REV-00-FACK, Stock # 6957