Mishimoto MMTS-MUS-96A Ford Mustang V8 Street Thermostat, 1996-2004 Fits the 19962004Ford Mustang V8 Lower activation temp allows coolant to flow through the engine earlier Maintains lower temperatures and extends engine life Mishimoto Activation: 179.6F (82C) / OEM Activation: 190.4F (88C) Mishimoto Lifetime Warranty OEM thermostat activates at 88 degree Celsius Mishimoto thermostat activates at 82 degree Celsius Greater cooling efficiency