4pcs Set Engine Piston Rings Kit 87.5mm EJ7Z6108A B C E EJ7Z6135A EJ7Z6140A EJ7Z6148A For Focus Mustang MKC 2.3L This piston rings kit is designed for use with Focus, Mustang, and MKC 2.3L engines.Constructed from metal alloys, the set provides performance and for engine rebuild or replacement applications.The standard 87.5mm piston diameter and 22mm pin size compatibility with specified engine models.Featuring a STD 0.00 specification, the rings are engineered to maintain dimensional stability without cylinder expansion.The design supports precise fitment and consistent under typical engine conditions.Suitable for both professional and DIY installations, the kit follows dimensions for straightforward integration into the engine build process.