Mishimoto MMTS-F2D-11L Ford 6.7L Powerstroke Low-Temperature Primary Cooling System Thermostat, 2011+ Direct fit for the 2011+ Ford 6.7L Powerstroke Lower activation temp allows coolant to flow through the engine earlier Ideal for vehicles in warm climates or under extreme towing/driving conditions Mishimoto Activation: 189F/196F (87C/91C) / OEM Activation: 194F/201F (90C/94C) Mishimoto Lifetime Warranty