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In the foreground is an SB2 camshaft, and the cam in the background is for the new RO7. Notice that the RO7 cam has an extra cam journal for support (six compared to the SB2's five). The journals are also much narrower to reduce friction. You can also see that the advanced overall design of the RO7 is more compact from the shorter camshaft, despite the fact that the block has a greater bore spacing (4.500 inches compared to the SB2's 4.400).