2.0L Pistons, with pre-installed rings and wrist pins. A set of four Mahle, 95mm Bore, STD 2.0L Opel pistons. You can build your 1.9L into a 2.0L using these 95mm bore pistons, which will give you 9.4:1 compression ratio with a standard 1.9L cylinder head. These are a 2.00mm, .080" oversize from the 93mm 1.9L bore size. 2.0L Head Gasket is required when assembling the motor with these 2.0L pistons.