Came off a Yamaha F115XB 2018 was running but running rough no corrosion on the read valves has some. Needs a rebuild to be in optimal condition The product is a cylinder head assembly specifically designed for Yamaha F115XB 115hp engines, with the manufacturer part number 6EK-11110-00-9S. Made by Yamaha in the United States, this component is essential for maintaining the performance and durability of your outboard engine. Whether you are looking to replace a damaged cylinder head or upgrade to a more efficient one, this genuine Yamaha part is sure to meet your needs for your 2014-2025 Yamaha F115XB 115hp engine.