Mishimoto MMTS-F2D-03FL Low-Temp Thermostat for 03-07 Ford F250 Powerstroke 6.0L

Vehicle Fitment

• 2003-2007 Ford F-250/F-350/F-450/F-550 Super Duty (6.0 L Powerstroke V8; RWD/4WD)
• 2004-2007 Ford E-350 Super Duty (6.0 L Powerstroke; RWD/4WD)

Fitment Notes

• Direct OEM-replacement thermostat and housing for the 6.0 L Powerstroke engine
• CNC-machined 6061 aluminum housing resists corrosion better than stock
• Requires Ford Motorcraft RT-1169 standard-temp thermostat (included)

Features

• Lower activation temperature of 185 °F vs factory 192 °F--promotes earlier coolant flow
• Durable CNC-machined aluminum housing improves seal integrity and longevity
• Ideal for heavy-duty towing, hot climates, and performance/tuned diesel setups
• Includes lifetime warranty for the thermostat and housing
• Easy bolt-in install with OEM-fit and no modifications required

Specifications

• Part Number: MMTS-F2D-03FL
• Activation Temperature: 185 °F
• Housing Material: 6061 CNC-machined aluminum
• Engine Coverage: 6.0 L Powerstroke V8 (2003-2007 Ford Super Duty & E-350)
• Warranty: Mishimoto lifetime (thermostat/housing)

Included Components

• 1x Mishimoto low-temp thermostat (pre-installed)
• 1x CNC-machined 6061 aluminum thermostat housing
• 1x Rubber O-ring seal for housing
• Installation instructions

Product Description

The Mishimoto MMTS-F2D-03FL thermostat and CNC housing upgrade is a direct OEM replacement for 2003-2007 Ford vehicles equipped with the 6.0 L Powerstroke V8, including F-250 through F-550 Super Duty and E-350 models. Featuring a durable 6061 aluminum housing and a low-temp thermostat that opens at 185 °F (versus stock 192 °F), this kit improves cooling efficiency by promoting earlier coolant flow, making it ideal for towing, performance, and hot-climate use.

Installation is straightforward and uses factory mounting points; the housing resists corrosion and enhances sealing compared to the cast stock version. With a lifetime warranty backing both thermostat and housing, the MMTS-F2D-03FL offers peace of mind, improved reliability, and consistent engine temperatures under demanding conditions.