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CPP Grid Heater Upgrade Kit & High-Flow Intake Kit for 6.7L Dodge Ram Cummins (2007-2018) If you own a 2007-2018 Dodge Ram with a 6.7L Cummins engine, the stock grid heater bolt is a hidden risk that can cause catastrophic engine damage. CPP Diesel’s Grid Heater Upgrade Kit with High-Flow Intake solves this problem while improving airflow, engine efficiency, and long-term reliability. Why the Stock Grid Heater Bolt is Dangerous The infamous “killer grid heater …