True, but it still does not have the real performance intent of a B. Ever look at the blocks? The B has much stronger webbing. The head? The B has the perfect pentroof chambers. Both those traits are better for turbo. The D is a decent motor, but the B is a better motor.. All I am saying is that if this guy wants to take down Sti's, he's going to need a built B, not the tired D he has in there.