Engine Pistons Rings Set Φ82.00mm for and models including F55, F56, G30, 120i, 220i.Compatible with B46 and B48 2.0L turbocharged engines (1998cc), compression ratio 11:1.Fits cylinder bore Φ82.00mm (STD).Piston pin diameter Φ22mm.Ring thickness: 1st ring 1.2mm, 2nd ring 1.5mm, 3rd ring 2.0mm.Compatible with models: 120i (2015–2019 F20/F21), 220i (2015–2019 F22/F23), 320i (2015–2020 F30/F31/G20/G21), 320i Gran Turismo (2016–2019 F34), 420i (2015–2019 F32/F33/F36), 520i (2016–2020 G30/G31), X1 20i (2015–2019 F48), X3 20i (2017–2020 G01), X4 20i (2017–2020 G02).Compatible with models: Cooper S (2015–2019 F55/F56/F57), Clubman S (2015–2019 F54), Countryman S (2016–2020 F60).Part numbers: 11258657760, 11258678931, 11258618503, 11258638450, 11259468870, 11258637807, 11258623260, 11259494399, 11259468871, 11259468869, 11258693017, 11258637991, 11257561710, 081RS00107, 0N08907950000, WG1889359, WG1889360, 081PI00126000.Material: metal.Color: silver.Package includes 4 piston rings sets. ote: This is a third-party compatible part.Brand/model citations do not imply sponsorship or approval.