The reason is, the full load of the engine and the dangerous temperatures you reach only when you are running with full load (wide open throttle) on high speed for a few km or highest acceleration from the third gear up to the top speed . That means for example 5km with speeds over 220 km/h or accelerating from 100km/h to the top speed. I do not know if you plan to drive like this in greek neither it is possible, but for accelerating up to 200km/h with highest speed I can give you full power without a new MAF-sensor because you do not need the reserves.