Saudi Grill and bumper.
I do not believe D2's were offered without cats, but some markets did not have the secondary O2's. I cant say which ones though.
BUT there is no reason to reprogram it to fool the system... I even kept mine AND still run a cat. It's not worth the effort if you get caught.
anyway, the ECM is different between NAS and GulfSpec and ROW. IIRC they are NOT interchangeable as the wiring harness is different too IIRC.