1、OEM Number: Engine coolant thermostat replace part number is 90916 03046. Please make sure the OEM number matches the part you are replacing. 2、Vehicle Fitment: Car thermostat is replacement for Chevy LS LS1 LS2 LS7 Engine, which is made according to the prototype of the car. 3、Efficient Temperature Control: The 71 degrees water neck housing is specifically designed to control the engine temperature, ensuring optimal engine performance. 4、Enhanced Engine Performance: With precise temperature regulation, the device helps to optimize engine performance, ensuring efficient combustion. 5、Sealed Installation: The 71 degree thermostat housing is equipped with a rubber seal for a secure and sealed installation. It is easy to operate and perfectly matches the original vehicle.