When performance is desired, adding a low-temp thermostat is an easy modification that produces results.  The cooler temp allows the fuel system to provide a denser air/fuel mixture ratio into the combustion chambers resulting in more horsepower.  The performance thermostat is engineered to provide OEM fit with added benefit of consistant coolant metering at the much desired lower temperature.  Manufacturered with the highest degree of quality through ISO 9001 certification and the automotive standard of QS 9000, these are of the highest quality.  Designed to resist variations in coolant pressures that occur at high RPM's where coolant temperature and pressure work against proper operation.  These thermostats open at the proper temperature as designed regardless of engine RPM's and will add life to your engine.