Ahhh, I get it now. It must admit exhaust gases direct from the head, There's a link here which has a pencil drawing of the location, which is useful to know.

https://www.talkford.com/threads/egr-valve-on-duratec-he.74612/


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4