Your pointer is a little bit off:
B18C2's are 170 & B18C7's are 200 rated fresh from the factory.
These 15 year old tired, leaky, smokey, oil burning engines won't be pulling those power figures anymore, so the "power difference" isn't so significant as you think.
The only real distinct advantage between the 2 is the type R gearbox, hence a lot of B18C7's for sale w/o the gearbox.
The B18C2, with the proper OEM parts combo, can be rebuilt to make the same, if not more power than the C7.
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