How efficient can cooling be made while preventing loss of output or overheating? Our answer is in an engine cooling system that is the result of investigating the problem of heat to the limit. Cooling air is guided through the aperture in a single stream to create a hermetic air duct, increasing supercharger efficiency while keeping engine temperature at a constant, appropriate level. The use of GT-R racing oil further increasing caulking efficiency, prevents turbine blow and ensures high performance.