its a calibre 52mm boost pressure gauge, got it from Supercheap. m thinking about getting the ford boost gauge that fits ontop of the dash with the clock, I think its a twin pod mount to hold 2 gauges. I have the single clock gauge to install there but want a boost gauge also. I thought the power wire was for the boost gauge to work? The Calibre boost gauge I got has a white wire for 12v,black wire ground and orange wire dash lighting, the instructions say white wire 12v ignition switch,black wire vehicle ground and orange wire 12v dash lighting.