Ok so i just got my 4-2-1 Headers in and the O2 sensor is in the proper spot and everything. But the "Hi Flow Catalytic Converter" does not have a spot to insert the O2 Sensor. What should i do? Leave it? the guy that put my exhaust said to get a hi flow so i did, and not to get a "test Pipe" cuz it wouldnt make me run right, itl mess the computer up..