I got the thermostat from TVT and installed it today, even though it is only 70 today, I can tell a difference in the engine temp gauge esp. when on the freeway -- it runs two marks lower than it did this morning before I made the change under the same load / running conditions (as best I can match things up). I will know more after this coming weekend's track day at PIR......... I have since added some Water Wetter too.......