Wondering if anyone can tell me what the following hook up is intended for on a FAST 102 LSXR intake? On the passenger side. Looks like a 7/16 molded in nipple. Also, are there any adapters that I can purchase that will fit on there and allow me ultimately connect to a 3/8 hose barb?

My intent with this inlet is to hook it to my catch can. To provide the vacuum to the catch can.

 

It is for the vapor purge

 

Is there an adapter plate that FAST or anyone else makes that can bolt up to it?

 

That's not EVAP!

That is the vacuum port and it should go to those valley covers with the integrated PCV valve but if your venting to atmosphere via breather cans off of the valve covers then that port can be closed off. Now if your plans are to run PCV and you do not have the valley cover with the built in PCV valve then you can still run to a sealed catch can from the driver side valve cover through the can and from the can to the vacuum port of the intake. As for the passenger valve cover if it only has one port that's up front it should be connected to the port on the throttle body and if no port then into the air duct between the MAF and throttle body. It would help to see more pictures of your setup!

 

?? Ya no that's not evap.....

 

Yup you are right. I flipped it in my head when I looked at the pic. My bad.

Pcv vacuum port. Not evap

 

More on my set up:
I’m running a Mighty Mouse catch can set up. Have the valve cover breather port on drivers side, and valley cover port T’d together, and then running off to the dirty side of the catch can. Clean side of catch can running to the intake via the port shown in first pic of this thread. Fresh air line from my air intake tube to the passenger side valve cover.

No EVAP. The Mighty Mouse catch can as the PCV. Using the FAST vacuum port on the drivers side to run a manifold pressure reference line to my fuel pressure regulator.

I was hoping someone made an adapter that bolts right onto that FAST drivers side port. But I was playing with it last night and a 3/8 line will push right onto that thing. I’m sure with a clamp it will never pop off. So I guess problem solved.

 

Cut it off and tap the hole for an NPT pipe thread and buy a Barbed adapter.

I actually broke mine and that's how I repaired it.

 

Maybe this will help. I believe this port is actually for the vacuum booster.
This is an LSXRT 102mm manifold.

 

This is what I used with my catch can. No issues so far.

 

Yep. That looks good. Where did you get that? I like the look with still the band clamp capability.