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looking to compare them to a 79 RX-7s intake mani ports. I heard that the rx4 12a intake mani flows better.
Of course, a 79 12-A intake flows better COZ THERE IS NO SUCH THING AS A RX-4 12-A INTAKE MANIFOLD (not sure about Australia since they did weird things outside the US). RX-4 came with 13-B motor