Abstract: Methods and systems are provided for modified intake runners including ribs in the direction of airflow. In one example, a system may include an intake manifold adapted to couple to an intake port via an intake runner. Internal to the intake runner, a plurality of negative ribs may be arranged along a direction of air flow on a façade of an inner portion.

Abstract: An intake system of an engine is provided. The intake system may include an intake manifold coupled to a first throttle body and a second throttle body, where the intake manifold is formed from an upper shell and a lower shell. The intake system further includes a vacuum port located in the intake manifold and in an air-flow path downstream of the first throttle body and the second throttle body and upstream of a plurality of intake runners of the intake manifold, the vacuum port including a spigot extending through the upper shell of the intake manifold, and a vacuum passage coupling the vacuum port to a vehicle subsystem.