WHAT IS THE STAMP FOR A TYPE R HEAD PR?

 

Really the B16a and B18C5 head appear the same from the out side. The difference is the inside. A quick way to check is look if there is duel valve springs on the intake and exhaust side, Type R. Also if it is complete in engine bay. The Intake mani's are different. Cams are different as well. There are stamps on them. You can find this as well in this fourm. The head shell is the same.