In simple terms...
B18C - Jap Spec Type R Engine
B18C Dual Plenum Intake Manifold - SIR/GSR Engine - Like the Vti-R engine except with a bit more "rated" power
B18C2 - Found in Vti-R Integras
B18C7 - Aus Spec Type R Engine
"i saw on for sale only has a b18c. and also the rev count goes up to 10? instead of 9 in the vtir's? "
Well then its probably had a conversion done to it including the cluster....
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