ACDelco Lifters are a type of mechanical component used in the internal combustion engines of automobiles. They are responsible for controlling the engine's valve opening and closing, allowing fuel and air to enter the combustion chamber and exhaust gases to exit. ACDelco Lifters are designed to be durable and reliable, with precise tolerances and high-quality materials used in their construction. They are essential to any engine's valve train and must be carefully maintained and replaced when necessary to ensure optimal engine performance and longevity.