Installing LT headers...need advice
http://shbox.com/1/1993_air_egr.jpg
The hole on the front of the passenger side manifold is likely a part of '94-'97 AIR Provisions seen in the picture below.
http://shbox.com/1/diverters.jpg
If you no longer have AIR or EGR on your car, simply use block off plates on the back of the intake manifold where the EGR used to be and just screw on caps to the AIR ports of the headers. and be done with it.



