Originally posted by westcoaststyle
I might have it wrong, but according to that site, the B18C is the same as the B18C5... :dunno: Might be bad info. :happysad:
So the B18C has the same CR as the C5, just with a different head setup?
I'm wondering myself now. 
h:
The ITR motor in Japan is stamped B18C only. The only way you can tell is by the intake manifold and head.