This 6-piece piston rings kit is designed for A4, A6, A7, A8, Q5, and Q7 vehicles equipped with 3.0 TDI engines.The kit includes piston rings sized to match OEM specifications, with a piston bore diameter of 83.01mm and piston pin diameter of 30mm.Ring dimensions are: first ring 83x1.8mm, second ring 83x2.0mm, and third ring 83x2.0mm.Constructed from heat-resistant aluminum , the components are engineered for under operating temperatures.The ring configuration supports effective cylinder compression and oil control, contributing to stable engine performance.This kit is intended as a direct replacement for OEM part numbers 059107065DF and 059198151N and is suitable for engine rebuilds or maintenance procedures.The material meets industry standards for matter content, supporting cleaner internal engine.