Abstract: A manifold system for an internal combustion engine, having a housing, which is designed as a collecting manifold and which has two inlet openings and an outlet opening for the flow connection of two outlets of an internal combustion engine to an exhaust system and at most two connection openings provided on the housing for connecting a double-shell inner air-gap-insulated manifold. An exhaust system is developed in such a way that, at the same time, the tone of the exhaust gas noise and thus of the exhaust system is optimized over a plurality of important rotational speed ranges of the internal combustion engine by a modular assembly.

Abstract: A manifold system for an internal combustion engine, having a housing, which is designed as a collecting manifold and which has two inlet openings and an outlet opening for the flow connection of two outlets of an internal combustion engine to an exhaust system and at most two connection openings provided on the housing for connecting a double-shell inner air-gap-insulated manifold. An exhaust system is developed in such a way that, at the same time, the tone of the exhaust gas noise and thus of the exhaust system is optimized over a plurality of important rotational speed ranges of the internal combustion engine by a modular assembly.

Abstract: A manifold system for an internal combustion engine, comprising a housing designed as a collecting manifold, which housing has two inlet openings and an outlet opening for connecting two outlets of an internal combustion engine to an exhaust gas system in regard to flow and at least one connection opening provided on the housing for connecting to an outer shell of a double-shell air-gap-insulated manifold, and comprising at least one air-gap-insulated manifold connected to the connection opening, which air-gap-insulated manifold has an inner shell having an inlet opening for connecting to an outlet of the internal combustion engine in regard to flow and having an outer shell, wherein all air-gap-insulated manifolds are completely formed from sheet metal and are structurally or geometrically identical and, on the housing, the size of a distance A2 between one of the two inlet openings and the outlet opening is between 30 mm and 300 mm or between 50 mm and 120 mm.

Abstract: A device for fastening an exhaust manifold to an internal combustion engine is provided. The device includes two parts. A first part that has first elongated holes for a screw fastening to the engine and openings for a screw fastening of a second bracket part. The second bracket part is fork-shaped, angular, and has on the angle branch facing the first bracket part second elongated holes and on the other angle branch, third elongated holes. The longitudinal axes of at least two of the elongated holes are oriented perpendicular to one another.

Abstract: A device for fastening an exhaust manifold to an internal combustion engine is provided. The device includes two parts. A first part that has first elongated holes for a screw fastening to the engine and openings for a screw fastening of a second bracket part. The second bracket part is fork-shaped, angular, and has on the angle branch facing the first bracket part second elongated holes and on the other angle branch, third elongated holes. The longitudinal axes of at least two of the elongated holes are oriented perpendicular to one another.