Sierra Thermostat Kit OMC/VP 18-3670 by Sierra International $20.79 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Sierra Thermostat Kit OMC/Volvo Penta #18-3670 T-Stat Kit: OMC 140 (1980-81), 2.5l & 3.0l, 1982-88