4PCS Pistons Rings 84mm Φ22mm CR Nural Goetze for 125i 320i 328i 428i 528i Fit N20B20A / N26B20A 2.0 Turbocharged (1997cc) Material: CR Nural Goetze pistons and rings Compression Ratio: 10:1, designed for 2.0L L4 turbocharged engines Piston Diameter: Φ84.00mm, suitable for various engine models Piston Ring Thickness: Available in 1.2mm, 1.5mm, and 2.0mm options to meet different engine requirements Pin Diameter: Φ22mm, compatible with multiple engine configurations Fitment: Designed for use with 2.0L L4 turbocharged engines, including N20B20A, N26B20A, and N20B20B variants These piston and ring sets are engineered for performance and durability in turbocharged applications.The 10:1 compression ratio supports efficient combustion and increased power output.With a standard bore size of Φ84.00mm and a pin diameter of Φ22mm, the set fits multiple vehicle models such as 125i, 320i, 328i, 428i, 528i, X1, X3, Z4, F30, F10, F25, E89, and others equipped with compatible 2.0L turbocharged engines. The kit includes four complete piston and ring assemblies, providing a full replacement solution.The design allows installation without cylinder boring in most cases, simplifying the rebuild process.Multiple ring thickness options proper sealing and oil control based on specific engine needs.This set is suitable for engine rebuilds or performance where internal components are required. Compatibility Statement: This is not an manufacturer part.Brand/model references are used for fitment guidance.