8Pcs Pistons Rings Kit STD Φ89mm 11257598207 For M5 M6 X5 X6 M E70 F10 S63B44 4.4T Engines Pistons w/Rings Pins Accessories This piston rings kit is designed for vehicles equipped with S63B44 or S63B44TU 4.4L V8 Twin Turbo engines.It includes 8 pistons, piston rings, wrist pins, and required accessories for a complete engine rebuild.The components are engineered to maintain cylinder dimensions with a standard 89mm diameter, proper fitment and function during reassembly. The parts are built to meet OEM specifications and support under -performance conditions.Suitable for use in select models with the specified engine types, this kit provides a comprehensive solution for engine restoration.Its design focuses on durability and consistent power output, making it suitable for both professional repair work and DIY engine projects.Installation is straightforward, allowing for efficient completion of engine overhauls. Compatibility Clarification: This part is not made by the brand.Mentioned models are for reference only.