2004-2008 180 Degree Engine Coolant Thermostat
Hot running late model engines often respond to a cooler thermostat by producing more horsepower. Modified engines sometimes run hotter and require more cooling. Mr. Gasket has produced this choice of three temperature level High Performance Thermostats, so that you can dial in just the cooling that is best for your application. Tests on GM engines have shown up a 5 horsepower gain is possible with the 180 degree thermostat.
Also known under these part numbers: (For reference only)