A pushrod is a mechanical component used in internal combustion engines to transfer motion from the camshaft to the engine's valves. It plays a crucial role in the engine's operation by opening and closing the valves at the right time during the combustion cycle. Pushrods are typically found in overhead valve (OHV) engine designs, where they connect the camshaft, located in the engine block, to the rocker arms that operate the valves. In a pushrod system, the camshaft rotates and pushes the pushrod upward, which in turn moves the rocker arm to open the valve. This design is often used in various types of vehicles, including those made by Chevrolet and Ford, due to its simplicity and effectiveness in managing engine performance.