Sierra 18-3670 160 Degree Thermostat Kit for OMC & VolvoFits: 2.5L & 3.0L OMC and Volvo Penta Marine engines (1982-88); Kit Includes: (1) 18-3558 Thermostat; (1) 18-2858 Thermostat Housing Cover Gasket; (1) 18-0929 Thermostat Gasket; Replaces: Volvo - 3853799 (Thermostat); Volvo - 3852127 (Cover Gasket); Volvo - 3852120 (Thermostat Gasket); OMC - 982554 (Thermostat); OMC - 314809 (Cover Gasket); OMC - 313416 (Thermostat Gasket);