N63 Pistons Rings Set For 550i 750i X5 F01 F02 F03 E70 E71 N63B44A 4.4L V8 Engine Part 11257613626 11257576475 11257556955 The N63 Pistons Rings Set is designed for vehicle owners looking to improve engine performance and.Constructed from forged aluminum, the set provides a strong and lightweight foundation suitable for performance applications.The design focuses on delivering consistent performance and under conditions.This piston and ring set is compatible with specific models including 550i, 750i, X5 F01, F02, F03, E70, and E71.It is engineered for use with the N63B44A 4.4L (4395cc) V8 Twin Turbo Engine.Featuring a compression ratio of 11:1, the set supports increased power output, contributing to a more responsive driving experience.The package includes one complete Pistons & Rings Set, providing all necessary components for installation.This upgrade is suitable for individuals interested in enhancing engine efficiency and performance.