The pipe (10) has combustion cylinders provided with exhaust outlets (2.1, 2.2). Multiple spacer segments (20) are formed in an exhaust gas passage. The exhaust gas passage is in contact with a coolant passage. An exhaust gas inlet is sealed with the exhau...

The head (1) has a lateral exhaust flange face (1c) arranged to be connected to an exhaust manifold. Another lateral exhaust flange face (1d) is opposed to the face (1c), a front face (1e) and an end face. An internal coolant cross over passage (2) provide...