Genuine BMW Alusil Piston Ring Repair Kit - 11259071606 - This kit is designed to help repair piston rings in BMW engines. It includes all the necessary components to repair piston rings, such as piston rings, seals, and bearings. It is designed to be used in BMW Alusil engines, which are made with a special aluminum-silicon alloy. This kit is an OEM product, meaning it is made by BMW specifically for their vehicles.