Stant 13588 Thermostat - 176 Degrees Fahrenheit 100% calibration is conducted for each heat motor to guarantee quality and performance Original equipment design provides exact fit and performance. Patented ELAC heat motor provides consistant valve response for precise engine cooling Stainless steel assembly and springs are engineered for long life and smooth performance. Use when you want 176 Degrees Fahrenheit (plus or minus 3 degrees tolerance)