During sports driving, when the engine revs up and down violently, the normal radiator hose collapses like a straw due to suction pressure, vibration, etc. This is especially true when replacing a large radiator. This tendency increases especially when replacing with a large radiator due to the large amount of water it sucks in.

In sports driving, the problem is not so much the bursting caused by high water pressure, but the "crushing" phenomenon caused by suction pressure. Once "crushing" occurs, it does not return even at idle rpm and heats up quickly. Spoon has created a special product made of thick-walled SEP material with the same high deformation resistance as racing aluminum pipes.