6 Set Engine Pistons Rings Kit with 84.00mm cylinder bore, designed for models equipped with N54B30 engines.Compatible with E82, E90, E60, and other chassis from 2006–2013, including variants such as 135i, 335i, 535i, 740i, and X6 35ix.Constructed with cast aluminum pistons and steel rings for.Features a wrist pin diameter of 22mm and wrist length of 53mm to proper fitment and sealing.Matches specifications with 0.00mm clearance, eliminating the need for cylinder boring.Provides improved power output and engine efficiency.This kit includes six complete piston and ring assemblies for full engine rebuild or performance upgrade.Engineered for direct replacement and integration with existing engine components. This replacement part is manufactured independently.All brand references are used solely to denote compatibility with listed models.