Cold Air Intake for Dodge Ram 2500 3500 (2003-2007) 5.9L L6 Diesel Engine RedHigh Velocity Induction: Cold Air Intake for the 5. 9L Cummins ISB Diesel Who Its For: Engineered for Dodge Ram 2500 and 3500 owners running the legendary 5. 9L Cummins ISB 24 valve powerplant who are tired of the stock sluggishness and high exhaust gas temperatures during heavy hauls. The Symptom: The factory intake on the 5. 9L Cummins is designed for silence above all else, which is a major handicap for a heavy duty diesel. It uses a restrictive,