Ok, so let me apologize for being the club P.I.T.A. in advance . I am installing a turbo kit soon. I just purchased the SCT Extreme tuner which has 2 analog inputs for additional sensors. I spoke with SCT and they sent me the wiring schematics on using firewire to connect to a MAP sensor to monitor boost via the tuner. My question is, Is anyone else using the GM Map sensor to monitor boost and if so is there a specific part number for the proper sensor? Second question is I also purchased an in cabin VBC. Its basically a valve that when you turn the knob clockwise it increases the boost, counter clock wise lowers the boost, it is not an electric jammy. I am assuming that the map sensor will be installed after the VBC? Sorry to sound like a dumbass but this is all new to me so if anyone can provide any input or better yet instructions on how to install that would be great, If not i will be posting my install and all my trial and errors.