The exhaust manifold is a very important part of the engines which receives exhaust gases produced by several cylinders and channels them through the exhaust system. Exhaust manifolds are made of cast iron or stainless steel and enhance efficiency and control of emissions in the engine. Know the types of exhaust moulds, the way they work, the heat resistance, problems with gaskets, and the indicators of leakage. Knowledge of exhaust manifold can be useful in improving the engine performance, fuel economy, and overall reliability of the vehicle.