Mishimoto MMTS-TC-05L Toyota MR2 Racing Thermostat, 2000-2005 Fits the 20052012 Scion tC 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: 180F (82C) Mishimoto Lifetime Warranty