I have a cobra intake on my car, and have also been curious as to the "plug the 4 ports" info. I have been seeing. I never pluged any 4 ports, and have no idea what these people are talking about, or even if they know what they are talking about. Everything swaps over from the stock intake, and you can route the EGR coolant outlets together with a piece of hose making a run around loop, or plug these two openings. Where are the "4 ports"? I would ignore these threads and just bolt the thing on there, youll figure it out with no problem.
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1993 GT/AOD
'93 Mustang GT