Cummins 3918370 Marine Aftercooler Assembly for 6BTA / QSB - Used

Application: Cummins B-series marine engines (6BTA 5.9 / QSB 5.9) aftercooler / charge air cooler assembly, casting 3918370. Condition: Used take-off, complete assembly with core housing, end caps, air elbow, and mounting bracket. Not pressure tested — recommended for rebuild/re-core before installation. Any fluids will be drained and ports capped for shipping. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.