Mishimoto Racing Thermostat – Ford 7.3 Powerstroke Hi-Temp. #MMTS-F2D-96L. Activates at a lower temperature so coolant flows through the system earlier. Allows for cooler engine temperatures. Mishimoto lifetime warranty.

Fits: 1996-2003 Ford F-250 Super Duty w/ 7.3L Powerstroke–1996-2003 Ford F-350 Super Duty w/ 7.3L Powerstroke–1996-2003 Ford F-450 Super Duty w/ 7.3L Powerstroke–1996-2003 Ford F-550 Super Duty w/ 7.3L Powerstroke