This head gasket is a high-quality replacement part for your Yamaha outboard engine. It is designed to fit perfectly and provide a reliable seal to ensure optimal performance. The gasket is made from durable materials to withstand the rigors of marine use and is easy to install. With the manufacturer part number 18-3892, this head gasket is compatible with Yamaha models C40 2 Cyl CV40, and is a great choice for those looking for a reliable replacement part. Don't let a faulty head gasket cause performance issues, get the Sierra brand head gasket and keep your engine running smoothly.