This 8-piece piston and ring set is designed for use in N62B44 4.4L V8 naturally aspirated engines.Constructed from forged aluminum, the pistons provide enhanced strength and heat resistance for engine conditions.The set includes piston rings with thicknesses of 1.2mm (), 1.5mm (second), and 2.0mm (oil control) to support proper compression and reduced oil consumption.With a precise 92.00mm cylinder bore, this assembly ensures compatibility with models including 545i, 645Ci, 745i, X5 E53, E60, E61, E63, E64, E65, and E66.Package includes 8 pistons and matching rings.