8pcs 11257519916 11257515760 N62B44 92mm Engine Pistons Rings For 545i 645Ci 745i X5 E53 E60 E61 E63 E64 E65 E66 N62 4.4L Forged aluminum construction provides durability and heat resistance suitable for performance applications. The pistons are designed for use with N62B44 4.4L V8 naturally aspirated engines, featuring a cylinder bore of Φ92.00mm and a stroke of 92mm. Each set includes 8 pieces of pistons and rings, with ring thicknesses of 1.2mm for the first ring, 1.5mm for the second ring, and 2.0mm for the third ring to meet specific compression requirements. This piston and ring set is engineered to fit models including 545i, 645Ci, 745i, X5 E53, E60, E61, E63, E64, E65, and E66. The design supports precise installation and consistent engine performance. Notice: This replacement item is produced by an independent supplier. All brand and model mentions are for compatibility purposes only.