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Recently, plastic air intake manifold (PAIM) has been adopted into gasoline and diesel engines as standard equipment. The advantages of the PAIM are light mass weight, low cost, high thermal-insulation efficiency and reduction of air pressure loss compared with a metal air intake manifold. However, in order to bring the advantages of the PAIM into play, many issues including static burst, noise and vibration, and so on should be settled in its design process. In this paper, the performance prediction and application example of PAIM are introduced.