An exhaust manifold comprising: a plurality of exhaust gas inlets; a center section that is configured to connect an engine to a turbocharger; said center section comprising: an inner assembly that defines an exhaust gas passage, the inner assembly including at least a first pipe segment that receives engine exhaust gases directly from the engine, a second pipe segment that directs engine exhaust gases into the turbocharger, an upstream pipe segment that receives exhaust gases from upstream inlets of the exhaust manifold and a downstream pipe segment that directs exhaust gases into a downstream collecting pipe for downstream inlets of the exhaust manifold; an outer housing assembly comprising a first housing component with an engine attachment interface and a second housing component with a turbocharger attachment interface, wherein the first housing component is positioned on one side of the inner assembly and the second housing component is positioned on an opposite side of the inner assembly such that the first and second housing components (60, 62) cooperate to surround the first, second, upstream, and downstream pipe segments (50, 52, 54, 56) of the inner assembly; and at least one fastener is configured to secure the first and second housing components (60, 62) together, so as to generate a compressive force to seal and hold the inner assembly in gas tight manner with respect to the outer housing assembly. a plurality of exhaust gas inlets; a center section that is configured to connect an engine to a turbocharger; said center section comprising: an inner assembly that defines an exhaust gas passage, the inner assembly including at least a first pipe segment that receives engine exhaust gases directly from the engine, a second pipe segment that directs engine exhaust gases into the turbocharger, an upstream pipe segment that receives exhaust gases from upstream inlets of the exhaust manifold and a downstream pipe segment that directs exhaust gases into a downstream collecting pipe for downstream inlets of the exhaust manifold; an outer housing assembly comprising a first housing component with an engine attachment interface and a second housing component with a turbocharger attachment interface, wherein the first housing component is positioned on one side of the inner assembly and the second housing component is positioned on an opposite side of the inner assembly such that the first and second housing components (60, 62) cooperate to surround the first, second, upstream, and downstream pipe segments (50, 52, 54, 56) of the inner assembly; and an inner assembly that defines an exhaust gas passage, the inner assembly including at least a first pipe segment that receives engine exhaust gases directly from the engine, a second pipe segment that directs engine exhaust gases into the turbocharger, an upstream pipe segment that receives exhaust gases from upstream inlets of the exhaust manifold and a downstream pipe segment that directs exhaust gases into a downstream collecting pipe for downstream inlets of the exhaust manifold; an outer housing assembly comprising a first housing component with an engine attachment interface and a second housing component with a turbocharger attachment interface, wherein the first housing component is positioned on one side of the inner assembly and the second housing component is positioned on an opposite side of the inner assembly such that the first and second housing components (60, 62) cooperate to surround the first, second, upstream, and downstream pipe segments (50, 52, 54, 56) of the inner assembly; and