8pcs Piston Rings Kit Φ89mm For S63B44A S63B44TU 44T V8 Engine Models 11257598207 11257556955 11257574822 Compatible With M5 M6 X5M X6M E70 F10 F85 F12 Automotive Motorcycle Parts

8pcs Pistons Rings Kit with part numbers 11257598207 11257556955 11257574822 designed for engines with S63B44A and S63B44TU 4.4L V8 twin turbo configurations.The kit includes 8 pistons, piston rings, and piston pins, engineered for compatibility with select vehicle models featuring the specified engine types. The pistons are constructed from forged aluminum to support strength and reduced weight.Each piston has a diameter of Φ89mm, matching the standard cylinder bore size for proper fitment.Three piston rings per unit are included with thicknesses of 1.5mm for the first and second rings, and 2.0mm for the third ring, designed to maintain effective sealing within the cylinder. Piston pins have a diameter of Φ22mm and a length of 64mm, providing secure linkage between the connecting rods and pistons.This configuration supports consistent mechanical under -performance conditions. Suitable for use in specific models including M5, M6, X5M, X6M, E70, E71, F10, F06, F12, F13, and F85 series vehicles where the S63-based 4.4L V8 twin turbo engine is installed.The design aims to restore engine integrity and support power output. Compatibility Clarification: This part is not made by the brand.Mentioned models are for reference only.

• Compatibility with multiple models including M5 M6 X5M X6M E70 F10 F85 and F12 equipped with S63B44A or S63B44TU 4.4T V8 engines
• -engineered piston ring kit designed for compression and engine performance
• Set includes 8 pieces of piston rings with a diameter of Φ89mm to match OEM specifications
• Direct replacement for part numbers 11257598207 11257556955 and 11257574822 accurate fitment
• Ideal for engine rebuilds and -performance maintenance to restore smooth and efficiency