Material: Steel OEM No.: 11257566479 Compatibility: F20, F21, F30, F81, F31, R55, R56, R57, R60, R58, R61, R59 (1.6T) Performance: Designed to withstand extreme temperatures up to 105℃ : Engineered for performance This piston ring set is constructed from steel to support engine under conditions.It is precisely designed for use in models with a 1.6T engine, including F20, F21, F30, F81, F31, R55, R56, R57, R60, R58, R61, and R59 variants.The material composition allows it to endure operating temperatures up to 105℃, contributing to sustained engine efficiency and service life.The set carries OEM number 11257566479 and provides a direct fit for specified vehicle models.Its design supports consistent performance across various applications, making it suitable for use in 1 Series, 3 Series, and similar platforms equipped with the compatible engine.Installation is straightforward as the piston rings are built to replace the components without modifications.The design helps maintain a clean internal engine environment and requires minimal maintenance once installed.