whats this for?(pic inside)

[1NonlyAccord]

I am just curious what this is for,it looks like a removable bolt.Im just woundering if it is anything? guessing itl do with boost/vaccum line?

[anothaRRR]

Yeah your right its for a boost line, you can use for your wastegate or boost controller...

[1NonlyAccord]

Yeah your right its for a boost line, you can use for your wastegate or boost controller...

so i would run the line from a vaccum source. to the manual boost controller,then from that into that port?
this is the turbo i just ordered and i just needed to know what that was for.

[anothaRRR]

U will use that port as your source to the boost controller then to the wastegate...U dont have to use it but its an option...

[Cameron.]

make sure that ***** is tightened down good, you might think it is, and cause you problems when you have a leak, and not know where its coming from.