3 bar MAP sensor.
I am running 11 psi on the stock sensor. It maxes out at 11.2 psi. A boost spike won't affect anything unless it is a pretty large one. I have spiked up to 12.6 psi and there was no CEL.
I have a 3.5 bar Zeitronix MAP sensor that will be put in when I decide on rescaling all the maps and retuning.