4x EA888 Engine Φ21mm Pistons & Rings 82.5mm STD Set For A3 A4 Q5 TT Seat 2.0 TSI 06H107065AM 06H107099AM Replacement piston set designed for EA888 engines with Φ21mm piston pins.Each set includes four pistons, piston pins, and snap rings for complete cylinder replacement.Constructed from aluminum to balance strength and weight, these pistons feature an 82.5mm standard diameter to maintain engine specifications.-machined to proper fitment and function in select and models equipped with 2.0 TSI engines, including applications requiring part numbers 06H107065AM and 06H107099AM.Designed for under normal and -performance conditions, this piston set supports efficient combustion and consistent power delivery.Suitable for use during engine rebuilds or performance where exact dimensional accuracy and component compatibility are required. Disclaimer: This is a compatible third-party part.Brand/model citations are solely for compatibility guidance.