A small block engine is a type of internal combustion engine characterized by its compact size and lightweight design. Typically featuring a V-shaped configuration, these engines usually have a displacement of 4.0 to 6.0 liters. They are commonly used in various vehicles, including cars and trucks, due to their balance of power and efficiency. Small block engines are known for their versatility and ease of modification, making them popular among automotive enthusiasts. Many manufacturers, such as Chevrolet, have produced small block engines that have become iconic in the automotive world, often used in racing and performance applications.