A Cylinder Head Flange is a metal ring that connects the cylinder head to the engine block. It is located on the top of the cylinder head and has a series of holes that match the bolts that hold the cylinder head in place. It prevents coolant leaks.Attributes:• Prevents the cylinder head from rotating on the engine block• Manufactured to precise specifications and is durable and reliableApplications:A Cylinder Head Flange transfers the heat from the combustion chamber to the engine coolant.