The Engine Heater Hose Assembly, No. 626-753, from Dorman Productsis designed to replace the HVAC heater hose (inlet and outlet) on certain Dodge Ram trucks, specifically the Dodge Ram 1500 2003-02. The original equipment hose can fail due to cracks in the plastic T-connector, which Dorman addressed by upgrading the hose assembly with an aluminum T-connector designed to prevent similar failures in the future. The assembly directly replaces the original heater hose and is durable enough to withstand extreme temperature changes, avoiding cracking and leaking.