Cummins High Temperature Thermostat Fits 1999 to 2007 Dodge RAM 2500 and 3500 - 5.9L Cummins engine;Fits 2007.5 to 2013 Dodge RAM 2500 and 3500 - 6.7L Cummins 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) 205 degree thermostat and o-ring;Lifetime warranty DODGE RAM 2500 RAM 3500 BASE LARAMIE SLT SPORT ST SXT TRX4 2002 2003 2004 2005 2006 2007 2008 2009 2010 5.9L (359) 6.7L Cummins Turbo Diesel HO (408) DIESEL Mishimoto Mishimoto Cummins High Temperature Thermostat - MMTS-RAM-99H MMTS-RAM-99H Thermostats