A breather hose is a part of the valve train's cover that enables pressure relief in the valve train cover. Pressure build-up in an unintentional part or system of a machine is an undesired event that could potentially damage the performance of the associated parts or system. These hoses enable pressure relief while still keeping ingress at bay.Attributes:• Resistant to corrosion and chemical activity• Resistant to dry rotApplications:These breather hoses are used in the engine's valve train to prevent pressure build up and ingression.