Abstract: The intake system is adapted to supply a substantially intimately blended combustible mixture of fuel and air to a combustion machine. A conduit is provided for conducting a flowing stream of fuel and air to a combustion machine. Mixing means for blending the stream comprises a peripheral flow focusing structure for redirecting the flow of at least substantially all peripheral portions of the stream from vectors of generally linear flow substantially adjacent the interior surface of the conduit to vectors of inward flow interjacently substantially converging toward a central zone removed from the interior surfaces of the conduit and removed from the focusing structure.