Low-Temperature Primary Cooling System Thermostat

Features:

• Direct-fit replacement for OEM thermostat
• Activates at lower temperatures than stock
• Improves cooling system performance
• Keeps engine temps lower under load
• Helps prevent overheating and heat soak
• Ideal for towing and hot climates
• Pairs well with upgraded Mishimoto radiators
• Designed for 2011-2014 6.7L Powerstroke
• Reduces thermal stress on engine components
• Made for stock or modified Powerstroke trucks
• Backed by Mishimoto Lifetime Warranty
• Tested for durability and long-term reliability

Keep Your Powerstroke Running Cooler When It Matters Most

If your 6.7L Powerstroke works hard in hot weather or spends its life towing heavy, keeping engine temperatures under control is critical. The Mishimoto Low-Temperature Primary Cooling System Thermostat is a simple upgrade that makes a noticeable difference in how your truck manages heat. By opening sooner than the factory thermostat, it allows coolant to circulate earlier and helps prevent heat from building up under load. This can be especially helpful during long pulls, stop-and-go traffic, or extended highway driving in warm climates. It installs as a direct replacement, so there is no guesswork or modification required. Whether your truck is stock or lightly modified, this thermostat adds an extra layer of protection for your engine. Backed by Mishimoto’s lifetime warranty, it is an easy upgrade that delivers long-term peace of mind.

Lower Activation Temperatures For Improved Cooling Efficiency

The Mishimoto MMTS-F2D-11L thermostat is designed specifically for the primary cooling system in 2011-2014 Ford F250 and F350 trucks equipped with the 6.7L Powerstroke. It features lower activation temperatures of 189°F and 196°F, compared to the factory thermostat which opens at 194°F and 201°F. This earlier opening point allows coolant to flow through the engine sooner, helping maintain more consistent operating temperatures. Lower engine temperatures can reduce thermal stress on internal components, especially during heavy towing or extended driving. The thermostat is engineered as a direct-fit replacement for the factory unit, ensuring proper fitment and reliable operation. It is an ideal complement to upgraded cooling components such as an aluminum performance radiator. Like all Mishimoto products, it is covered by a lifetime warranty to ensure long-term durability and confidence in demanding conditions.

Fitment: 2011, 2012, 2013, 2014 Ford F250/F350 6.7L Powerstroke

Notes:

• Fits 2011-2014 Ford F250 and F350 6.7L Powerstroke
• Designed for the primary cooling system
• Opens at 189°F and 196°F for quicker coolant flow
• Lowers engine temps compared to stock thermostat
• Helps prevent overheating under load or in hot climates
• Ideal for towing, performance, or heavy-duty use
• Direct-fit replacement for OEM thermostat
• Works well with Mishimoto performance radiators
• Recommended for both stock and modified trucks
• Covered by Mishimoto’s lifetime warranty