Powerstroke High Temperature Thermostat Fits 2003 to 2007 Ford F250, F350, F450, and F550;6.0L Powerstroke engine;Direct fit;Higher activation temperature restricts coolant flow for a longer time;Quicker engine warm-up;Ideal for use in cold climates;Includes: (1) 200 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 High Temperature Thermostat - MMTS-F2D-03H MMTS-F2D-03H Thermostats