The heads are the same, the cooler is capped though, IIRC. The EGR modulator port should be covered too though.
So, what were the NOx results? Have you by chance looked to see if the ECU is USDM or JDM? I'm curious and would like to know more.
I'm not sure if it's the same situation with JDM GTE intakes, but the GE's intake doesn't have any of the porting for the EGR. To add EGR to a JDM 7M-GE you have to swap over the upper USDM intake plenum/surge tank and the USDM "Y" pipe. I suspect that you would need a USDM upper intake plenum/tank along with the cooler plate and the modulator. The wiring may vary a little too, but I am unsure.
Have you checked for error codes? Checked anything Mirage suggested?
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