comparison between jdm b18a, b18a1, b18b head

[hafizi01]

just wondering does those heads of b18a(jdm ca2), b18a1(usdm db1), b18b(integra db7) interchangeable? means, if i have a b18a1 block, can i use either jdm b18a/usdm b18b head on top of it?:omg:

p/s: sry if this thread is in a wrong section..:bow:

[A18A]

no

[hafizi01]

would u mind to explain further why is it so? :bow:

[A18A]

well i'm not sure about the b18a1 & b18b, they may be interchangable between each other, but they wont fit a b18a block. the b18a is a completely different engine to those