4 Set Pistons & Rings Kit designed for 1998-2007 A3, A4, and other models with 1.8T engines.Compatible with engine codes AWW, AWP, AUG, AWM, and specified OEM part numbers 06B107099AG, 06B107065F, VW06B107065F.This kit includes 4 pistons and rings constructed from materials to support engine efficiency and extended service .The components are engineered for fitment and in demanding conditions.Installation is supported by straightforward instructions, allowing for a replacement process.Suitable for use in vehicles requiring specification parts, this piston and ring set contributes to consistent engine and long-term . This is a non- replacement.Any reference to brand names or models is strictly for compatibility purposes.