90.5mm

Part Number 01-98-1191-B: Piston Ring Set – Cast Top Ring, 90.5mm (2 x 2 x 4.8mm) (Ref. P/N: 311 198 16991)

Part Number 01-98-1190-B: Piston Ring Set – Cast Top Ring, 90.5mm (1.5 x 2 x 4mm) (Ref. P/N: 311 198 16990)