1.OEM standard 2.For engine assembly line. 3. For Cummins 6B,6C,M11,K19/38, NT, L engines, also SDEC SC8D, SC9D, G128 engine We could offer thermostat for Cummin engines as follows: 1135675THERMOSTAT, K19M 170° F VENTED2146076THERMOSTAT3201737THERMOSTAT4204586THERMOSTAT53059408THERMOSTAT M11/N1463076489THERMOSTAT, ...