I have a P73 HF-2 stamped intake manifold. Is this B16 or ITR?

 

P73 is an ITR manifold.

B16 manifold would be Pr3 is Obd1 and P30 if obd2 i believe.

If your using a B16 head, the B16 manifold flows better on that head than a ITR manifold.

 

Well here's the set up as of today. It's a C5 block and pr3-4 head. I decided to find out exactly what kind of head it is so I looked at the cams today and based on the pics I saw here on HT it would seem I have a 92 GSR B17 head. Well, at any rate the cams are def 92-93 GSR. I was really hoping it would be a stock Type R head.

 

PR3-4 could be a ITR head casting, but could also be B16 I believe, but whether or not the internals are ITR, you would have to open the valve cover back up and look for dual valve springs. Could be that someone took out just the cams, or they could have removed the whole valvetrain.

 

I think I'll reopen it and check for dual valvesprings tomorrow. Thanks for the info. I'll be back with an update.

 

What led you to that conclusion? B16 and ITR head castings are identical.