An intake manifold (1) is disclosed suitable for use with an internal combustion engine. The manifold (1) comprises a set of runners (1,2,3,4), a conical-shaped chamber (7) and a conical-shaped distribution body (8) affixed concentrically within the chamber (7). The chamber (7) has one end (9) affixed to an air intake/throttle body. The other end (10) of the chamber (7) is connected to each of the runners (1,2,3,4) such that the end (10) is evenly divided into four quadrants each quadrant being of the same cross-sectional area. The order of connection of the runners (1,2,3,4) to the end (10) is in the firing order of the cylinders 1 3 4 2. The volume of each runner (1,2,3,4) is identical. The respective ends of the runners (1,2,3,4) immediately adjacent the end (10) of the chamber are curved towards the inlet valve of the respective cylinders they serve. The internal conical distribution body (8) is affixed within the chamber (7) such that its broader end (11) evenly overlaps the runners (1,2,3,4) at their junction with the end (10) and is positioned at, or closely to, that end (10). The body (8) may be movable axially within the chamber (7).