Anyone put a 180 stat in a 99+ GT?
 

I have a 99 gt and was thinking of putting in a 180 degree thermostat and I wanted to know if this might damage anything. It seems like my car loses a bit of power after it fully warms up. Thanks !!

It won't cause any problems. You won't lose or gain any power. The only thing it will do is lower the engine temp a little.