The Mishimoto'street thermostat for the 1996 - 2004 Ford Mustang will promote greater cooling efficiency throughout your engine for daily drivers.The Mishimoto'street thermostat will lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warmed up the Mishimoto'street thermostat will open up at a slightly cooler lower temperature than standard thermostats to allow the coolant to flow through the engine sooner.Opening sooner will help reduce and maintain cooler engine temperatures for daily drivers.