In January 2020 a new project started in Autotecnica Motori: the development of a new V6 turbocharged spark ignition engine for motorsport application. The aim of this thesis project is to understand, by means of computational fluid dynamics simulations, which is the best intake manifold configuration for this engine. Constrained from the engine assembly, only two possible intake manifold configurations are possible: the first one with an air flow that enters in the intake manifold aligned with the axis of the engine bank, and the second one with an air flow that enters in the intake perpendicular to the engine bank.