EA888 Engine Piston & Ring STD Gen2 06H107065AM For A3 A4 A5 TT Q5 Seat Leon Material: aluminum pistons with steel rings Piston Diameter: 82.5mm (Φ21mm pin diameter) Piston Pin Diameter: Φ21mm Ring Thickness: 82.5x1.2, 82.5x1.5, 82.5x2.0 Buckle Size: 21x1.5mm Compatibility: Designed for A3, A4, A5, TT, Q5, Seat Leon models with EA888 engine The 82.5mm piston diameter is a standard size, facilitating easier integration during engine rebuilds.Multiple ring thickness options—82.5x1.2mm, 82.5x1.5mm, and 82.5x2.0mm—allow for customization based on performance requirements.The 21x1.5mm buckle size contributes to secure component alignment during. This is an independent replacement component.References to brands or models are solely for compatibility indication.