8pcs 11257598207 11257556955 11257574822 Pistons Rings Kit Φ89mm For M5 M6 X5M X6M E70 F10 F85 F12 S63B44A S63B44TU 4.4T V8 Material: grade forged aluminum Piston Diameter: Φ89mm Piston Ring Thickness: 1st 1.5mm, 2nd 1.5mm, 3rd 2.0mm Piston Pin Diameter: Φ22mm Piston Pin Length: 64mm Fitment: M5, M6, X5M, X6M, E70, E71, F10, F06, F12, F13, F85 models with S63B44A/S63B44TU 4.4L V8 Twin Turbo engines Package Contents: 8pcs Pistons, Rings, and Pins This piston rings kit is designed for models equipped with the S63B44A or S63B44TU 4.4L V8 Twin Turbo engine.The pistons are constructed from grade forged aluminum to support strength and reduced weight.The ring set includes three rings per piston with thicknesses of 1.5mm, 1.5mm, and 2.0mm, engineered to provide effective sealing to minimize oil consumption and cylinder wear.Each piston is fitted with a pin measuring Φ22mm in diameter and 64mm in length, stable linkage between the connecting rod and piston.The kit supports precise installation with a cylinder bore diameter of Φ89mm, maintaining engine efficiency and reducing the risk of cylinder deformation.Suitable for use during engine rebuilds or performance.