Intake manifold gasket/injector seats

[Gokiwi64]

So still hunting potential boost leaks and have found that the inlet manifold has one of the phenalic (?) heat isolation gaskets but no actual intake manifold gaskets - does it need them ?, that is manifold gasket/phenalic isolator/manifold gasket.

Same thing for the injector seats they all look pretty manky and two show signs that they maybe leaking ?