Mishimoto MMTS-WRA-87L Jeep Wrangler 2.5L/4.0L/4.2L Racing Thermostat, 1987-2006 Fits 1987-2006 Jeep Wrangler / This item also fits additional vehicles 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: 180F (82C) / OEM Activation: 195F (90.5C) Mishimoto Lifetime Warranty