Abstract: An exhaust manifold configured to be coupled to a cylinder head of an internal combustion engine includes a manifold section. The manifold section includes a manifold tube configured to receive exhaust gas from the cylinder head, and a water jacket tube at least partially defining a tube configured to receive cooling fluid. The manifold tube is received in the water jacket tube. The manifold section further includes a support in a gap between the manifold tube and the water jacket tube, and an adaptor tube coupled to the water jacket tube and configured to provide flow communication between the cylinder head and the manifold tube.