Finally back for a break, here is a small update.
AFR sensor shit itself after three or so years, and its replaced.
ECU is adding time so I asked Mao to put 2-3 more degree timing to it and reduced the boost a bit. Compared to summer, it made 10 more hp, and cracked the 600nm mark
In order to make the car more comfort, I put on a Apexi butterfly valve btw down and center pipe. SO MUCH quieter and no more droning on freeway. Just need to watch my foot when the valve is not fully open.