An overhead cam engine, often abbreviated as OHC, features the camshaft located above the engine's cylinders. This design allows for more precise control of the engine's valves, improving performance and efficiency. OHC engines can be found in many modern vehicles, as they help reduce weight and complexity compared to older designs. There are two main types of overhead cam engines: single overhead cam (SOHC) and double overhead cam (DOHC). SOHC engines have one camshaft for both intake and exhaust valves, while DOHC engines have separate camshafts for each. This setup enhances airflow and power, making OHC engines popular in high-performance applications.