Manifold heaters, also known as intake manifold heaters, are a critical component in modern internal combustion engines. They are designed to aid in cold starting by preheating the air-fuel mixture before it enters the combustion chamber. These heaters consist of an electric element that is strategically placed inside the intake manifold. When activated, the element rapidly heats up and transfers its heat to the surrounding air, effectively warming up the incoming fuel mixture. This helps to improve fuel atomization and vaporization, resulting in a smoother and more efficient combustion process. Additionally, manifold heaters reduce engine wear during cold starts by minimizing fuel condensation on cylinder walls and preventing ring scuffing.