PISTON CYLINDER CYLINDER KIT FOR STIHL chainsaws MODELS: MC CULLOCH: MAC 738 MAC 740 MAC 742 MAC 838 MAC 842 PARTNER: P842 P840 P742 P740 Part No.: 54.120.1793 MC CULLOCH PARTNER COMPATIBLE WITH: JONSERED MODELS: CS2138 2138 CS2138C Original code: 545 12 21-01