I guess it was inevitable...
Exhaust manifold, where the manifold joins the turbo (turbine).
New X8R cast iron part ordered and on the way. Replacing it looks to be a fun task!
I'll try to replace it without removing the valve cover. Removing the valve cover requires removing the entire inlet tract and injectors etc.
Trouble is, the rocker cover includes the frame for the air filter element, so it totally obscures the exhaust manifold. This is a task that will need to be performed virtually blind...
As we say down-under... Bugger...