The Facet Thermostat Assembly - 78770 is a component used in automotive engines to regulate the temperature of the engine. It is responsible for opening and closing the flow of coolant through the engine, ensuring that the engine stays within its optimal temperature range. This assembly includes a thermostat, housing, and gasket, and is designed to be a direct replacement for the original part. It is compatible with a variety of vehicle makes and models and is made from high-quality materials for durability and reliable performance. The Facet Thermostat Assembly - 78770 is an essential part of the engine cooling system, helping to prevent overheating and potential engine damage.