I just bought the Greddy Warning Gauges and they were used when i got them... I need to know if the gauge comes with a new map sensor in order to read the boost or what map sensor they use so that i can get one out of a junkyard. aka i'm a poor ****... and also if anyone has them i could use the wiring schematics on the guages i have the turbo/boost guage and the air fuel ratio gauge w/ new o2 sensor. if anyone has anything or knows anywhere i can do to get info other than the greddy website (it don't show shizza) it would be GREATLY appreciated. thanks