Mishimoto MMTS-MUS-96 Ford Mustang V8 Racing 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: 154.4F (68C) / OEM Activation: 190.4F (88C) Mishimoto Lifetime Warranty