MAHLE ORIGINAL 001 RS 11127 0N0. PISTON RING SIZE. Type PISTON RING SET. Ring Thickness [mm] 2.00 mm x 1.75 mm x 2.00 mm. OM 654.920 4 75 - 235 102 - 320 from 1950 Diesel. Cylinder Bore [mm] 82 mm. See all condition definitions open in a new window or tab.