Piston diameter: 82.5mm Pin bolt diameter: 21mm Ring thickness: 1.2 / 1.5 / 2.0mm Compatible with vehicles equipped with CDHA EA888 engines, including models such as , A3, A4, A5, and TT This piston and ring set is designed for 1.8T engine applications, providing a precise fit for engine rebuilds.The components are engineered to handle operating temperatures, supporting performance under demanding conditions.With a piston diameter of 82.5mm and pin bore of 21mm, the set matches specifications for compatibility and function. The kit includes multiple ring thickness options to allow for fine-tuning during rebuild, improving sealing and oil control.Each set contains pistons, rings, and wrist pins sufficient for all four cylinders, along with related hardware such as snap rings, bearing shells, oil seals, gaskets, and timing chain tensioner for a complete overhaul. Designed specifically for use in 1.8T EA888 engines, this reconstruction kit supports efficient engine and improved combustion integrity when installed correctly. This is a non- replacement.Any reference to brand names or models is strictly for compatibility purposes.