B18c2 with 1.6L twin cam head vtec

[ZeForce]

hey also would anyone know the difference in the b16a and the ba18c2 head. by looking at them both what is difference?. i have herd that they both look the same only difference is that the b16a head is closed chamber? is there anything else to keep an eye out for? thanks

The combustion chamber designs are probably the most noticable difference between the two heads. The P72 (B18c) head has much larger quench pads so the chamber isnt a full circle compared to the PR3 (B16a)

PR3 (B16a/ITR):


P72 (B18c):