In-cylinder flows significantly impact the performance and emissions of an internal combustion engine. In-cylinder tumble, swirl, and squish flows are crucial for generating turbulence, which helps improve air-fuel mixing and combustion efficiency and reduce emissions. Various techniques are currently employed to create these flows, viz., directed and helical ports, valve shrouding and masking, modifying piston top profiles, and vanes in ports. However, studies on the modification of engine cylinder heads are limited in the literature, which may be due to space constraints. This study proposes a CFD analysis on using baffles in the cylinder head to improve engine performance without affecting the combustion chamber space. A four-stroke, four-valve, spray-guided, gasoline direct injection (GDI) engine operating under part-load conditions is considered. A new discretization scheme is used to find the spatial distribution of the air-fuel mixture inside the combustion chamber of the engine. From the results, it is found that the baffles help mixture stratification even for early fuel injection. Also, the indicated mean effective pressure and indicated thermal efficiency is increased with the reduction of hydrocarbon and carbon monoxide emissions.