What about the RBXX series, they seemed to flow well on that chart, at least the intake. One of the biggest draws to the 104 for me is the fact that it doesn't start mixing fluids. My HG is throwing buckets of oil, but there's not much mixing. The flow doesn't seem to affect it's ability to make HP. 217 from an N/A 3.0 is pretty impressive, especially with mechanical fuel injection. I can only imagine what it could have done with new valve technology, direct injection, and both cams being variable. MB screwed the pooch, and now they're downsizing engines and using turbos!!!!