No Miguel you are mistaken. The brothers are the ones who started passing the word that 1g bottom ends will misfire in a 2g. They started telling everyone after they swapped a 1g head on their car and their misfire problem went away. I have only joked to my friends about it how rediculous that notion is. I will say it one last time.THERE IS NO DIFFERENCE between a 1g and 2g head. They both mount the sensor EXACTLY the same. What the brothers noticed was pure coincidence and never should have been spread like a fact. They are to this day clueless as to why their misfire went away. And furthur just because they have done a handful of swaps and not had a problem with them doesn't mean the misfire problem doesn't exist. It simply does not happen to ALL cars.