4X Pistons Rings Set Φ84mm Cylinder Bore: Φ84.00mm Wrist Diameter: Φ20mm Wrist Length: 50mm Ring Thickness: 1st 1.2mm, 2nd 1.5mm, 3rd 2.0mm Quantity: 4x Pistons Rings Set Designed for use with engines having a cylinder bore of Φ84mm, this piston rings set supports proper combustion sealing and consistent engine.The set includes four piston rings with varying thickness to match standard specifications.engineered to fit models with N46B20 engine configurations, including chassis codes E81, E91, E92, and E60.Compatible with applications identified by part numbers 11257562451, WG1016344, and 40085600.Installation follows standard procedures for piston ring replacement, allowing integration into engine rebuilds or maintenance routines. This is an independent replacement component.References to brands or models are solely for compatibility indication.