Australian Conflux Technology has partnered with race car builder Dallara to develop a liquid hydrogen-to-coolant heat exchanger for next-generation hydrogen internal combustion engine endurance racing cars. In the pre-study phase, the teams are addressing cryogenic thermal management challenges, including preventing coolant freezing at ultra-low temperatures, controlling hydrogen embrittlement risks, and optimizing weight and thermal performance within extremely tight packaging constraints. The heat exchanger is a critical subsystem of the liquid hydrogen storage and delivery system, directly influencing pump selection, system packaging, total mass, and integration with existing cooling circuits. The project supports the Le Mans 24 Hours organizer's hydrogen roadmap toward 2030, aiming to supply a validated liquid hydrogen ICE technology platform for future manufacturers and teams. Conflux's additive manufacturing heat exchanger capabilities complement Dallara's race car systems engineering expertise, representing a frontier breakthrough for AM in extreme thermal management applications.