8 Set Pistons & Rings Kit designed for N63B44 4.4L V8 engines.This set is intended as a direct replacement for worn or damaged pistons and rings, suitable for use in models equipped with the N63 engine platform.The kit includes eight pistons and corresponding rings constructed from forged aluminum, engineered to support performance. Each piston features a compression height of 32.1mm and an overall length of 52.6mm, optimized for an 11:1 compression ratio.The wrist pin diameter measures Φ22mm with a pin length of 60mm, and the cylinder bore diameter is Φ89mm.These dimensions are aligned with specifications to proper fitment and function within the engine block. The components are designed for straightforward installation, allowing integration into existing engine assemblies without modification.Intended for use during engine rebuilds or performance , this piston and ring kit supports under conditions.Suitable for applications in vehicles requiring part numbers 11257617547, 11257574823, 40631600, WG1726229. This item is a third-party substitute.Use of brand names is limited to indicating which devices it supports.