My friend gave me a cylinder head off of some SOHC Honda. It has a PM3 stamp on it. Does anyone knows which model did it came off from? I know the Civic/CRX Si has a PM6 stamp on the Cylinder and other parts of the car

 

i have the same question....except my friends si stamp on the head says PM3-6. im trying to find out if the stamp on the exhaust side on the far right of the head is a displacement number, cause my head says 1/6 over there.
peace