18-3866 Head Gasket
- The Sierra 18-3866 Head Gasket is interchangeable with the following: GLM 35930, Evinrude/Johnson 340115, 333549, Mallory 9-63826. Each Sierra product meets or exceeds the original equipment part it replaces.
- Sierra Head Gasket
- Meets or exceeds the original equipment quality
- Sierra part number: 18-3866
- Interchangeable with the following: GLM 35930, Evinrude/Johnson 340115, 333549, Mallory 9-63826
Replaces GLM 35930, Evinrude/Johnson 340115, 333549, Mallory 9-63826
