I have an 89 Gts and I have the obx header on it, The
EGR I just bend a bit till it lined up. My car also needed an
o2 sensor for my etest, I got this one
http://www.alloxygensensors.com/Shop...LA+GTS&mode=PA
The bottom
Denso one is the correct one, Price has gone up since I got one tho. Was $138 then I purchased one, but it works perfect. And yes your car should run with the
EGR disconnected, but you should find a way to leave it connected.
oh and yes my o2 Sensor did not fit in the OBX down pipe, Had to drill the holes out a bit till it fit, But it works.