Mishimoto MMTS-MUS-05L Ford Mustang V8 Racing Thermostat, 2005-2010 Fits the 20052010 Ford Mustang V8 and maintains lower temperatures and extends engine life Lower activation temp allows coolant to flow through the engine earlier Mishimoto Activation: 160F (71C) / OEM Activation: 180F (82C) Engine Codes: 3.0L Duratec 30 V6; 4.6L Modular V8; 5.4L Triton V8; 6.8L Triton V10 Mishimoto Lifetime Warranty