Mishimoto Ford 6.4L Powerstroke Low-Temperature Thermostat (Set of 2)

If your Ford 6.4L Powerstroke is running a bit too warm, especially under load or in hot weather, a set of Mishimoto Low-Temperature Thermostats can help. These are direct-fit replacements for your factory thermostats, designed to help keep your engine running cooler. A failing thermostat can lead to overheating, which can cause serious internal engine damage, so replacing them is a smart move for reliability.

These Mishimoto thermostats open earlier than stock, at 187°F and 197°F, compared to the factory's 192°F and 203°F. This earlier opening means coolant circulates sooner, helping to keep engine temperatures down, which is especially beneficial if you're towing heavy loads or driving in warmer climates. They come as a set of two, along with a replacement gasket, making the job straightforward.

For an even more robust cooling system, consider pairing these with the Mishimoto 6.4L Powerstroke Aluminum Performance Radiator. Mishimoto backs these thermostats with their Lifetime Warranty.