The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 2019 2024 RAM with 6.7L Cummins. The auxiliary port is threaded to accept a 10AN 7 8 in 14 fitting to allow you to customize your coolant routings and includes port plug FPE SP 7814. APPLICATION NOTES Direct replacement for thermostat elbow included in our coolant bypass kits FPE CLNTBYPS CUMMINS 19. Direct replacement for 2019 2024 Cummins 6.7L coolant thermostat housing. Auxiliary port is threaded to accept a 10AN 7 8 in 14 fitting