Powerstroke Low Temperature Thermostat Fits 2003 to 2007 Ford F250, F350, F450, and F550;6.0L Powerstroke engine;Direct fit;Low activation temperature allows coolant to flow through the system earlier;Reduces and maintains lower engine coolant temperatures;Includes: (1) 185 degree thermostat, and o-ring;Lifetime warranty FORD F-250 SUPER DUTY F-350 SUPER DUTY F-450 SUPER DUTY F-550 SUPER DUTY FX4 HARLEY-DAVIDSON EDITION KING RANCH LARIAT XL XLT 2003 2004 2005 2006 2007 6L Powerstroke Turbo Diesel (363) DIESEL Mishimoto Mishimoto Powerstroke Low Temperature Thermostat - MMTS-F2D-03L MMTS-F2D-03L Thermostats