During sports driving, where the engine speed rises and falls sharply, the normal radiator hose will be crushed like a straw due to suction pressure and vibration. Especially when replacing with a large radiator, the tendency becomes higher because the amount of water absorbed is large. In sports driving, the problem of “crushing” with suction pressure is more important than rupture with high water pressure. Once “crushed”, it will not return even at idle speed and will heat up immediately. As for the spoon, we have made a thick-walled SEP material that has a high degree of deformation resistance and is exclusive to the car model, similar to the aluminum pipe for racing.