When you install the open air on the rs and take of the stock air filter holder with the snorkel, Underneath all that is like two plug things (Sorry dont no much about cars) i belive this to be the throttle body. Whatever it is does the open air just sit on the top and hookup without any mods?

 

It's been awhile since I've looked at a TBI but let me see if I can figure it out... in the middle of the throttle body there are two injectors i think each with a cone type shape underneath it. If you get a non drop base open air filter holder, you can take off that gold colored ring and sit the filter assembly right on the throttle body, there may be a gasket or something,not sure though, and then what I did was put a hole in the new air cleaner for the IAT sensor. I think you also need to plug a vacuum line

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90 IROC 5.7l (L98)
ram air, K&N's, air foil,Flows