High temp silocone couplers for cooling rack near heat exchanger

Are these the recomended high temp type couplers for cooling rack with removeable cooling tubes, or just on the front section of the cooling rack,depending on your tubeing sizecouplers

Those would work, but I think the radiator hose would be a little cheaper. You could probly get away with using them anywhere on the rack except for the cooler connection from the heat X

Thought i seen some body saying they used that type in the hotter areas, just checking too see if any one had used those kind,Fun job building for gasification,the second one should be much easyer,Thanks joseph,