4 Pcs Piston And Ring Set CR 11:1 FOR FOR S F30 F56 G20 2016-2021 2.0T Part Numbers: 11259468870 11 25 9 468 870 Fitment: Designed for 320i (F30 Chassis) 2016-2018 B48B20A 2.0L 1998cc DOHC Designed for 320i (G20 Chassis) 2019-2021 B48B20A 2.0L 1998cc DOHC Designed for 520i (G30 Chassis) 2017-2021 B48B20A 2.0L 1998cc DOHC Designed for S (F56 Chassis) 2014-2021 B48A20 2.0L 1998cc DOHC Designed for Clubman S (F54 Chassis) 2016-2021 B48A20 2.0L 1998cc DOHC Specification Details: Quantity: 4 Pieces (Pistons and Rings Set) Compression Ratio (CR): 11:1 Engine Code Compatibility: B48 2.0T Package Includes: 4 x Pistons 4 x Piston Ring Sets (for 4 pistons) Installation Information: Clean the engine block and cylinder head surfaces to remove all old gasket material and carbon deposits. Measure cylinder bore diameter and piston diameter to confirm compliance with engine specifications. Install piston rings onto the pistons in the sequence specified by the component manufacturer, typically compression rings first, then oil control rings. Orient the ring gaps according to technical manual specifications, often staggering them relative to one another. Lubricate pistons and rings with clean engine oil prior to insertion into the cylinder bores. Compress the piston rings using a ring compressor tool and carefully insert the piston assembly into the cylinder bore while aligning the connecting rod to the crankshaft journal. Secure the connecting rod cap using specified torque values and fasteners if required by the engine procedure. This item is a compatible alternative. Use of brand identifiers is limited to showing which models it fits.