Intake manifold for an internal combustion engine

An induction manifold for a fuel injected multiple cylinder internal combustion engine which comprises a rigid air plenum chamber receiving a supply of air therein, a separate individual air intake pipe extending from the plenum chamber directly to each of individual engine cylinders, and an extension connected directly to each individual intake pipe and disposed within the plenum chamber for uniform uninterrupted supply of air to each individual intake pipe via its extension, each extension comprising a plurality of axially aligned and uniformly spaced pipe sections completely contained within said plenum chamber together providing an effective tuned length of intake pipe.