I've got a PR3 head stamped with 1991, but a B16A2 intake manifold that is all stamped P30 with OBD-I harness. The cams look like the following



The head is not a P61, but these don't look like B16A cams. What kind of cams are these and what head is this?

 

well the head could be out of a 92 gsr.
The head on 92-93 gsr's is stamped pr3 and the year says 91 on wich is usually a year before the car( so it would be a 92 car); so it prolly is a gsr head.

 

but its got a P30 IM as well as a few other P30 parts on it.

AND

this ff-squad website contradicts itself...

 

uh oh............what you doing with a VTEC head.............

 

don't worry about that louie!

 

My head is stamped PR3-4 and has a 91 casting stamp to. It was from a 93 civic VTi. PR3 is also on the block around the driverside above the oilpan.