he present work has resulted in the development of numerical and experimental methodologies for prediction of the acoustic performance of an air filter box of an internal-combustion engine for automotive applications. With the aim of characterizing its fluid-dynamic behaviour and acoustic attenuation, the latter is first analysed as an isolated component. Typical performance parameters such as the discharge coefficient C-D, the pressure losses, the noise reduction and the transmission loss are experimentally and numerically evaluated. Different numerical approaches are considered, including complete three-dimensional computational fluid-dynamics analyses and finite element-boundary element procedures. The latter also take into account the interaction with the vibrating structure. The preliminary air-box design is also modified through the introduction of a column resonator and a Helmholtz resonator. Both the base and the modified system are finally coupled to the whole engine to estimate the gas-dynamic noise emitted by the intake system. The new architectural solutions of the intake system are characterized by improved acoustic performances and also preserve a good power output of the entire engine system. In each case the comparisons with experimental findings showed good correlation with the numerical predictions