The Rein Engine Oil Thermostat O-Ring - 99970731440EC is a high-quality replacement part for your vehicle's engine oil thermostat. This O-ring is designed to seal the connection between the thermostat and the engine block, ensuring that your engine oil stays at the optimal temperature for proper lubrication. Made from durable materials, this O-ring is built to withstand high temperatures and resist leaks, ensuring long-lasting performance. It is a direct fit for the specified part number and is compatible with a variety of vehicle makes and models. Keep your engine running smoothly with the Rein Engine Oil Thermostat O-Ring - 99970731440EC.