This is a replacement O.S. Engines gasket set, and includes one back plate o-ring and two copper shim head gaskets.
NOTE: This part may be compatible with other O.S. engines. Please check your owner's manual or the O.S. Engines website and cross reference the part number to verify that this is the correct part for your engine.
| 91SZ-H Ringed
|| 91RZ-H DH