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In this simulation of the Boss intake, the velocity data is displayed in smoothed color gradients. Directional information is not so clear, but the surging interplay of the intake air among the eight intake runners is more defined. Spotting lazy areas, such as to the outer plenum walls just in from the throttle body opening, is thus quite simple. Again, this is a screenshot from a short video representing 720 degrees of crankshaft rotation; red denotes the highest velocity, blue the slowest.