Pin Bolt Diameter: 24mm Pin Bolt Length: 56mm Cylinder bore: 92.9mm OEM NO.: A2780302317 Condition: The A2780302317 8pcs Pistons Rings Set is designed for use with specific engine models, including those found in vehicles from 2011 to 2019 with X166, W166, W221, W222 chassis codes and compatible with GL500, S500, M278, GLS500, E500, ML500 engines equipped with 4.6T and 4.7T powertrains.This set includes eight pistons and corresponding rings, providing a complete replacement solution for engine rebuilds. Each piston ring is manufactured to match specifications.The 24mm pin bolt diameter and 56mm pin bolt length proper fitment within the connecting rod assembly.With a cylinder bore size of 92.9mm, the set supports internal combustion performance under standard operating conditions.Ring thicknesses are varied across the set, including 1.2mm, 1.5mm, and 2.0mm, allowing optimized sealing, oil control, and heat transfer during engine. The components are built to maintain low emissions output and meet requirements for acceptable volatility at elevated temperatures.Designed for direct fit installation, this set integrates into existing engine configurations without modification.For accurate compatibility, verify fitment using vehicle-specific technical data.This piston ring set supports restoration of engine efficiency, compression, and overall operational. This is a non-OEM replacement.Any mention of brand names is strictly for compatibility clarification.