Model Name: 2019 2020 2021 2022 2023 2024 F30 F31 F32 F10 F25 E90 F30 F80 E96 E92 F26 E70 F15 F85 F16 F86 325D 330D 335D 430D D435D 525D 530D 535D 550D 640D 730D 740D 750D 30D 35D 40D Saloon Estate Convertible Coupe No of Cylinders: 6 Engine Code: N57D30A N57D30B N57 N57D30 OEM Number: 11257805329 7805329 41268600 081PI00105000 The STD Piston & Ring Set is designed for engine maintenance and replacement, compatible with Alpina D3, D4, D5, XD3, and 3, 4, 5, 6, 7, X3, X4, X5, X6 models equipped with 3.0L and 3.0T L6 engines.The set includes -engineered pistons and rings built to match specifications for.It serves as a direct replacement for worn or damaged factory components, supporting engine rebuilds, repairs, and performance restoration. Compatibility spans various body types including sedan, estate, coupe, convertible, and from model years 2005 to 2024.Referencing OEM numbers 11257805329, 7805329, 41268600, and 081PI00105000 proper fitment across multiple applications.The product supports engines with designations N57D30A, N57D30B, N57, and N57D30.A digital guide is included to assist with installation and maintenance procedures specific to the vehicle model. This item is a third-party substitute.Use of brand names is limited to indicating which devices it supports.