Exhaust manifolds play a vital role in engine efficiency by directing exhaust gases away from the combustion chamber while managing heat and flow dynamics. A well-designed exhaust manifold improves gas scavenging, reduces back pressure, and helps the engine breathe more efficiently—directly impacting power output and fuel economy. The shape, length, and diameter of manifold runners influence how quickly exhaust gases exit the engine. Smooth bends and equal-length runners promote consistent gas f