Regulating shaft in a device for a combustion engine

The regulating shaft (1) comprises functional elements that are arranged on the pivoting regulating shaft is pivoted in a bearing sleeve (5). The regulating shaft is provided as a plastic injection molding component, and injected in the bearing sleeve. The functional elements are formed as pivoting flaps (2). An independent claim is also included for a suction pipe system for multi-cylinder internal-combustion engine.