Abstract: Exhaust Manifold and Exhaust Header is one of the important additives of IC engine for enhancing the volumetric performance. The volumetric performance of the engine may be expanded with the aid of using decreasing the backpressure and growing the exhaust pace with inside the exhaust manifold and header. These studies examine the float via unique fashions of exhaust manifold and exhaust header the use of CFD and Thermal evaluation for a 6 cylinder inline engine. The layout of exhaust

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... anifold is changed to get gold standard geometry. The evaluation consequences of fashions are as compared for returned stress and pace of exhaust fuel line. By evaluating the consequences of fashions the lower in returned stress is located which make sure development in volumetric performance of the engine. Keywords: Exhaust Manifold, Exhaust Header, CFD Analysis, Thermal Analysis, 6-Cylinder Inline Engine