Ok, please advise. My 1078 just got the full MV Corse system with the Dynojet PC, it starts and runs fine, all is good. But, there is no port on the new MV exhaust for the stock o2 sensor so it is zip-tied to the frame. Does a port need to be welded in the exhaust for it? Just remove it? The red service light is on, I assume the sensor is the issue. Is it even needed anymore? Trying to fix it soon so hope someone has done this before. Thanks.