i have an 2004 grand prix gt that is supercharged. first off is it rare that i have a supercharged from the factory gt? and i am wanting to put a boost gauge in the top driverside air vent to the left of my steering wheel keep in mind this is the new body style and i have seen people put the gauges in there vents in there speed3's so i wanna try it in my gp and if anyone has done it some pics and info would be great. thanks