Good question, not sure what temp sensor bypass you are talking about.
I am running the slp single pipe , it only has a resistor that connects in line from the egt. prob in the pipe ,to the ecu. It is only a tempary solution to trick the ecu in thinking the egt. is cooler than it realy is so the ecu will add more fuel. Slp will have another solution shortly I believe.
OK I thought it was the temp sensor just got my pipe yesterday and didnt have time to look at it closely. I wonder still has anyone with an SLP single running this resistor had this problem?