Sierra International 18-0347 Valve Cover Gasket The Sierra 18-0347 Valve Cover Gasket is interchangeable with the following: GLM 32210, Mallory 9-61317, Mercruiser 27-52145, 27-806452, 27-34041, OMC 913277, 912981, 3852693, Volvo Penta 3852693. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Valve Cover Gasket Meets or exceeds the original equipment quality Sierra part number: 18-0347 Interchangeable with the following: GLM 32210, Mallory 9-61317, Mercruiser 27-52145, 27-806452, 27-34041, OMC 913277, 912981, 3852693, Volvo Penta 3852693