N52B25 11:1 Pistons Rings Set Φ82mm 11257612982 11257561848 For E83 E90 E91 E60 E61 F10 F11 E89 323i 325i 523i 525i X1 X3 X4 This pistons and rings set is designed for use with specific engine models, featuring a compression ratio of 11:1 to support increased engine output.Constructed from forged aluminum pistons and steel rings, the components are engineered to maintain sealing efficiency and withstand elevated operating conditions.The set includes 6 pistons, 6 rings, and all necessary hardware for installation. With a cylinder bore of Φ82mm and wrist pin diameter of Φ20mm, this kit is built to match the specifications of select engine platforms.It is intended for use in models including E83, E90, E91, E60, E61, F10, F11, and E89, and fits engines found in 323i, 325i, 523i, 525i, X1, X3, and X4 variants.Designed for drivers and mechanics looking to rebuild or upgrade their engine, the set supports improved horsepower and torque while maintaining durability under performance demands. Compatibility Advisory: This product is not affiliated with the manufacturer.Brand mentions are for fitment reference only.