Mishimoto MMTS-F2D-03CL Low-Temp Thermostat & Housing for 2003-2007 Ford 6.0L

Vehicle Fitment

• 2003-2007 Ford F-250 Super Duty (XL, XLT, Lariat, King Ranch, Harley-Davidson Edition, FX4, 6.0L Powerstroke Diesel, 2WD/4WD)
• 2003-2007 Ford F-350 Super Duty (XL, XLT, Lariat, King Ranch, Harley-Davidson Edition, 6.0L Powerstroke Diesel, 2WD/4WD, SRW/DRW)
• 2003-2007 Ford F-450 Super Duty (XL, XLT, Lariat, 6.0L Powerstroke Diesel)
• 2003-2007 Ford F-550 Super Duty (XL, XLT, Lariat, 6.0L Powerstroke Diesel)
• 2003-2005 Ford Excursion (XLT, XLS, Eddie Bauer, Limited, 6.0L Powerstroke Diesel)
• 2004-2010 Ford E-350 Super Duty (Base, 6.0L Powerstroke Diesel)
• 2004-2005 Ford E-350 Club Wagon (XL, XLT, Chateau, 6.0L Powerstroke Diesel)

Fitment Notes

• Fits the 6.0L Powerstroke (VT365) diesel engine only - does not fit 6.4L, 6.7L, or 7.3L Powerstroke applications.
• Designed as a direct-fit replacement for the OEM thermostat and thermostat housing; no modifications required.
• The cast aluminum housing replaces the factory housing and is compatible with the stock cooling circuit.
• Ideal for warm-climate operation and heavy towing or performance driving where maintaining lower engine temperatures is the priority.
• Replaces OEM part numbers 3C3Z8575AA and 3C3Z8592AB.

Features

• Lower activation temperature of 185°F (85°C) versus OEM activation at 192°F (89°C) - allows coolant to circulate sooner, reducing and maintaining lower engine operating temperatures.
• Ideal for warm and hot climates where the factory thermostat allows engine temperatures to climb too high under normal driving conditions.
• Recommended for extreme towing and high-demand driving scenarios where additional thermal headroom is needed to prevent overheating.
• Cast aluminum thermostat housing provides a corrosion-free, rust-resistant upgrade over the aging OEM plastic and metal housing.
• Thermostat comes pre-installed inside the cast aluminum housing for a streamlined, hassle-free installation process.
• Replaces both the OEM thermostat and thermostat housing in a single install - addressing two common 6.0L Powerstroke failure points simultaneously.
• Direct-fit design bolts directly into the factory location with no cutting, drilling, or cooling system modifications required.
• Backed by Mishimoto's Lifetime Warranty on all included components for long-term peace of mind.

Specifications

• Part Number: MMTS-F2D-03CL
• UPC: 811580034015
• OEM Part Numbers Replaced: 3C3Z8575AA, 3C3Z8592AB
• Mishimoto Activation Temperature: 185°F (85°C)
• OEM Activation Temperature: 192°F (89°C)
• Housing Material: Cast Aluminum
• Engine Application: Ford 6.0L Powerstroke Diesel (VT365), Turbocharged V8
• Fitment Type: Direct Replacement
• Installation Position: Engine coolant circuit, thermostat housing location
• Package Dimensions: 6" (L) x 4" (H) x 3" (W)
• Item Length: 5.25" / Item Width: 3.00"

Included Components

• 1x Mishimoto Low-Temperature Thermostat (pre-installed in housing)
• 1x Mishimoto Cast Aluminum Thermostat Housing
• 1x Rubber O-Ring (for thermostat housing seal)

Product Description

The Mishimoto MMTS-F2D-03CL is a low-temperature thermostat and cast aluminum housing kit engineered as a direct-fit replacement for 2003-2007 Ford F-250, F-350, F-450, and F-550 Super Duty trucks, 2003-2005 Ford Excursion, and 2004-2010 Ford E-350 Super Duty vans equipped with the 6.0L Powerstroke diesel engine. Where the MMTS-F2D-03CH raises the activation point for cold-climate fast warm-up, this low-temperature variant does the opposite - it lowers activation to 185°F compared to the factory 192°F, allowing the coolant to begin circulating through the engine sooner. This earlier coolant flow helps reduce and stabilize operating temperatures, making it the preferred choice for owners in warm or hot climates, and for those who regularly subject their Powerstroke to heavy towing, high-load work cycles, or performance driving conditions where engine heat builds rapidly.

This kit simultaneously addresses one of the most common maintenance concerns on the 6.0L Powerstroke platform: the failure-prone factory thermostat housing. The OEM housing is known to crack and corrode over time, leading to coolant leaks and cooling system pressure loss. Mishimoto's cast aluminum replacement housing offers a durable, corrosion-resistant solution that provides a reliable seal for the life of the vehicle. With the low-temperature thermostat already pre-installed inside the housing, the kit arrives ready to bolt in. The included rubber O-ring ensures a leak-free connection between the housing and the engine block. No modifications, adapters, or additional hardware are required.

The MMTS-F2D-03CL is a practical and cost-effective upgrade for any 6.0L Powerstroke owner looking to improve thermal management while also eliminating a chronic OEM housing issue in a single service event. It pairs well with upgraded radiators, intercoolers, and EGR cooler upgrades as part of a comprehensive cooling system build. Whether you are performing routine maintenance on a high-mileage diesel or proactively upgrading a recently acquired truck, the MMTS-F2D-03CL delivers reliable performance backed by Mishimoto's Lifetime Warranty.