Genuine stihl gasket set for the MS661.
Contains the following parts
Cylinder Gasket 1144 029 2300
Muffler Gasket 1144 149 0600
Muffler Cover Gasket 1144 149 0500
Crankcase Gasket 1144 029 0501
Crankshaft Seal Flywheel Side 9640 003 1561
Crankshaft Seal Clutch Side 9640 003 1851