In the modding of the y-bridge I removed a sensor mounted at the top-the dealer tells me its a pressure sensor-no duh-it says so on top of it-my questions-what is it for and do I have to put it back? it is mounted to the top section of the ybridge just as it bends to meet the intercooler pipe on a 2004 LB7. I don't know if its a factory boost sensor or a baro/map sensor?