Thought 96's have 6 CATs total?. Mine did, got rid of them and got BBK X w/mid pipe setup. Mines a 97 GT vert. O2 sensor, bank1 downstream. 2 ways to get rid of it. Tuner (expensive), or mil delete able (no tune). I tuned mine. Used tuner to turn off rear O2s. $150 just sittin there to plug the hole. LOL.