Cummins ISC / ISL Air Intake Elbow – 3" to 4" Connection – P/N 3682674. Part Number: 3682674. 1x Cummins Air Intake Elbow (3" to 4" connection) – P/N 3682674. This OEM elbow is built to provide a secure, leak-free connection in your air intake system, ensuring proper airflow and engine performance for Cummins ISC and ISL diesel engines.
