Had an exchange head for an EF delivered today from Cylinder Head Warehouse.
No casting number on the head and am wondering what it is.
It fair dinkum looks like it just came off a production line.
There's a stamp on the head only - 2013 0 303 A3 33
The A3 has been stamped separately and is not aligned.
I wanted the 94AB head due to the flow.
Were any of these heads cast by anyone else?

There were new heads cast aftermarket.

Must be then. There's no ridge across the middle at the front like I see in a 94AB or 91AA.
Still like to know what it is cast as.