Mishimoto MMTS-RAM-94L Dodge 5.9L Cummins Low-Temperature Thermostat, 1994-1998 Direct fit for 19941998 Dodge Ram with 5.9L Cummins Lower activation temp allows coolant to flow through the engine earlier Ideal for vehicles in warm climates or under extreme towing/driving conditions Mishimoto Activation: 174F (79C) / OEM Activation: 180F (82C) Mishimoto Lifetime Warranty