Cooled two-stage turbocharging system

A vehicle comprising:

• a driven wheel;
• and
• a powertrain including an internal combustion engine and a transmission assembly operatively connected to the engine and configured to transmit engine torque to the driven wheel, the engine including:
• a cylinder block defining a cylinder;
• a cylinder head mounted to the cylinder block and configured to supply air and fuel to the cylinder for combustion therein;
• an exhaust manifold operatively connected to the cylinder head and configured to exhaust post-combustion gasses from the cylinder;
• and
• a turbocharging system configured to pressurize an airflow being received from the ambient for delivery to the cylinder, the turbocharging system including:
• a low-flow turbocharger having a first turbine housing and configured to be driven by the post-combustion gasses from the exhaust manifold, to pressurize the airflow, and to discharge the pressurized airflow to the cylinder;
• a high-flow turbocharger having a second turbine housing and configured to be driven by the post-combustion gasses from the exhaust manifold, to pressurize the airflow, and to discharge the pressurized airflow to the cylinder;
• a flow control device configured to selectively direct the post-combustion gasses to the low-flow turbocharger and the high-flow turbocharger;
• and
• a cooling module configured to cool the second turbine housing.