FPR is a fuel pressure regulator. It'* inside the fuel rail on the back side, the only thing with a vac line running to it in the fuel rail.
YOU HAVE NO MAP SENSOR if you didn't get a factory boost gauge like my SSEi. Can't stress that enough. Don't waste time looking for one.
See how I tee'd in? This vac line goes directly to the FPR on the back side of the SC/Fuel rail.
Gauge location. I wanted stealth. The pillar pod is in the SSEi, but won't ever have one in the SLE/SC.