This 8-piece piston ring set features a 93.00mm bore diameter and is designed for 4.5L V8 M48.50 engines used in vehicles with 955 and 9PA chassis codes from model years 2003 to 2007.The set includes rings with thicknesses of 1.2mm (), 1.5mm (second), and 2.0mm (oil ring).Wrist pin specifications are 23mm in diameter and 60mm in length.The rings are engineered for precise fitment to support cylinder sealing, reduce oil consumption, and maintain consistent engine performance.This set is compatible with reference part numbers 94810303134, 99610303351, and 94810334100.It serves as a direct replacement for the specified engine applications.