This 6-piece piston and ring set is designed for use in A6, A7, and A8 vehicles equipped with the 2.8L FSI V6 engine (engine codes BDX, CCDA, CCEA).The set features pistons with a standard bore size of 84.5mm (actual piston diameter: 84.475mm) and a wrist pin diameter of 19mm, a precise fit for compatible engines.It is suitable for model years 2007 through 2017, including A6 (C6, C7), A7, and A8 variants.The kit serves as a direct replacement for OEM part numbers 079311327A, 06E107065CF, and 06E107066CF.Each set includes six pistons and matching ring sets with thicknesses of 1.0mm ( ring), 1.2mm (second ring), and 2.0mm (oil control ring), engineered to maintain compression, reduce oil consumption, and support engine.The components are built for under regular driving conditions and allow for efficient installation by professional technicians or experienced DIY mechanics.Proper installation helps restore engine performance and supports long-term.