Sierra 18-3942 Piston Rings
Sierra 18-3942 Piston Rings, Sierra 18-3942 Piston RingsSierra replacement piston rings for Mercruiser Stern Drives. All piston rings are supplied complete with piston rings and wrist pin. Size: Std; Interchangeable with: Mercruiser Stern Drive; 39-67132; 39-34479; 39-67119; 39-58096;