Bking:
Just a question?
How do you introduce exhaust gas (EGR) into a turbo charged inlet manifold?
Internal pressure will be between 9 to 14 psi in the inlet manifold and the exhaust outlet pressure even before the turbine will be about equal(has to drive the blower)
So how does the exhaust gas get into the inlet manifold against a positive pressure?
Many truck will run closer to 2 bar boost pressure and some more than that.