Aluminum cylinder with steel sleeve. 55mm lightweight aluminum piston kit. Gasket kit including cylinder head and cylinder base gaskets. Now includes the port for the EFI sensor on the 2019+ models. 10.25:1 compression ratio. Our stock photos shown are of the actual item. This is to ensure your package gets to you as quickly and as well packaged as possible. Our inventory is constantly updating and changing, we do our best to keep it as accurate as possible. However, in some instances seasonal items sell very fast and can be subject to temporary delays. In the event of a prolonged delay we will make our best effort to contact and notify you of such delays. We will do our best to work with you to get you your item as fast as possible. Electrical parts are NOT returnable.