This 4-piece engine piston rings set features an 82.00mm bore diameter (standard size) and is compatible with F20, F23, F33, F55, F56, and G30 models equipped with 120i and 220i engines.Specifications: - Cylinder bore: 82.00mm (STD) - Compression ratio: 11:1 - Piston pin diameter: 22mm - Ring thickness: ring 1.2mm / Second ring 1.5mm / Oil ring 2.0mm - Engine compatibility: B48 2.0T (1998cc) turbocharged engine Package includes: - 4 piston rings Referenced OE numbers: 11258657760, 11258678931, 11258618503, 11258638450, 11259468870, 11258637807, 11258623260, 11259494399, 11259468871, 11259468869 Additional reference part numbers: 11258693017, 11258637991, 11257561710, 081RS00107, 0N08907950000, WG1889359, WG1889360, 081PI00126, 000