Genuine GM ACDelco 180° & 185° Thermostat Kit Front Rear 2001-2018 Duramax Diesel

ACDelco GM Genuine Parts engine coolant thermostats monitor the flow of coolant through your vehicle's engine and radiator. Built to the exact specification of your original component, these are the only GM-recommended replacements. Do not settle for anything less than the best; choose ACDelco GM Genuine Parts.Opening Temperature Rating (degrees F): 180 degrees F /185 degrees FThermostat Flow Rate: Standard-flowGaskets Included: YesACDelco Part Number: 131-163 & 131-131GM Part Number: 97241129 & 97241130Fitment: 2001-2018 Chevy/GMC 6.6L Duramax Diesel Engines (LB7 / LLY / LBZ / LMM / LML / L5P)