If you are ever doing a water pump or head gasket, why wouldn't you replace this hose? These bypass hoses are kevlar reinforced with a thicker wall for durability. If your engine has a small hose going from the water pump to cylinder head, that is the bypass hose. 
 
We also have an upgraded longer lasting silicone hose (C-GZA2083BLACK).
 
May require trimming on some applications.