B46 B48 2.0 Auto Pistons & Rings Set 11259468870 11258638448 11258618502 CR 11:1 For 320i S F30 F56 G20 G30 2.0T Piston and ring set for 4-cylinder engines with compression ratio 11:1.Designed for use with B46B20 and B48B20A 2.0L turbocharged engines.Standard specification with no cylinder expansion required.Cylinder bore diameter is 82.00mm.Wrist pin diameter is 22mm.Ring thickness: first ring 1.2mm, second ring 1.5mm, third ring 2.0mm.Kit includes pistons and rings for four cylinders.Compatible with models requiring OE numbers 11259468870, 11258638448, 11258618502, 11258657760, 11258623260.Fits vehicles with engine codes F20, F21, F22, F23, F30, F31, F32, F33, F34, F36, F48, F54, F55, F56, F57, F60, G01, G02, G20, G21, G30, G31.Suitable for applications including 120i, 220i, 320i, 320i Gran Turismo, 420i, 520i, X1 20i, X3 20i, X4 20i, Cooper S, Clubman S, Countryman S produced between 2015 and 2020.