Abstract: The invention relates to an intake system for an internal-combustion engine charged in one or two stages. The intake system is to be used with as few changes as possible in both a one-stage as well as a two-stage supercharging. The exhaust gas turbochargers, the charge air coolers and the air collecting housings as well as the interconnect pipes between these system parts and the pipes to the inlet ducts of the cylinder heads are used in the same arrangement in both a one-stage and a two-stage supercharging. The arrangement of the charge air cooler used in the one-stage supercharging, is the same as the high-pressure charge air cooler of the two-stage supercharging. The arrangement of the exhaust gas turbochargers in the one-stage supercharging, is the same as that of the high-pressure exhaust gas turbochargers in the two-stage supercharging.