Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

The intake manifold distributes air or air/fuel mixtures to the individual cylinders under varying engine speeds, loads, and environmental conditions. Whether the working flow is pure air, air/fuel, ...

In our last issue, we assembled a number of different 5.4 intake manifolds and compared them to the factory Navigator intake assembly on a modified 5.4L Four-Valve motor ("Factory Fast Vs. Advanced ...