Engine Piston Rings Set 11257506222 FOR Sedan Coupe Convertible Touring 330i X3 X5 Z3 Z4 M54 3.0 This piston ring set is designed for use with specific engine models.It includes components that fit engines requiring part number 11257506222.The set is intended for installation in vehicles with 3.0L inline-six engines commonly found in certain sedans, coupes, convertibles, touring models, X3, X5, Z3, and Z4 variants equipped with the M54 engine.Each ring is manufactured to meet specifications for proper fit and function.The set supports compression sealing and oil control within the cylinder bore.Installation requires standard mechanical tools and knowledge of engine assembly procedures. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.