HVAC Heater Core. Heater Core. 2011-2018 Ram 3500 Engine: 5.7L V8;. 2011-2018 Ram 3500 Engine: 6.7L L6;. 2014-2018 Ram 3500 Engine: 6.4L V8;. IMPORTANT: To confirm that this part fits your vehicle, enter your vehicles Year, Make, Model, Trim and Engine in the Compatibility Table.
