This Yamaha outboard engine head is a genuine OEM part, compatible with 25-40hp 4-stroke engines made in Japan. It is designed to provide optimal performance and reliability for your boat, ensuring that it runs smoothly and efficiently. The part is specifically removed from F40LA models and is marked with the manufacturer part number 6BG-11111-00-9S. Please note that this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm, as indicated by the California Prop 65 Warning. It is important to use this engine head with caution and to maintain your boat's performance by regularly servicing it. This item is perfect for anyone looking for a high-quality replacement engine head for their Yamaha outboard engine.