Can someone educate me on what the 4 connectors on the plenum are for? Wondering if it is possible to "T" into one of these to run an aftermarket boost gauge or if I would need to drill and tap into a new/separate location to do this. They look perfect for a boost gauge, but another far more experienced person actually tapped his gauge into the Y-pipe. I'd rather not modify a nice aftermarket piece if there is a simpler solution.

 

From driver to passenger side:

VTG controller > FPR signal > fuel vent > Brake booster.

Since I donr use vtg's anymorw I use the far left port for the BOV signal, and I've T'd into the fpr signal for a digital boost gauge/control.

Easiest way would be using a vacuum block.

Good luck

 

You don't need to add anything else for a boost gauge. I'm running one teed right off the fuel pressure regulator. You can also tee into the BOV areas.

 

Interesting. Pics of the install? Where did you route the vacuum line and where did you mount the gauge?