This piston ring replacement set (: 11257566479) is designed for direct installation in compatible engines including N12, N13, N16, N18, 116i, and 316i.It replaces worn or damaged piston rings without requiring modifications such as cutting or splicing.Made from metal, the set supports consistent engine performance and.The package includes one complete set of piston rings.Color and finish may vary slightly based on production batch.Note: Only the listed piston ring set is included; other tools or accessories are not provided.