Can someone give me the FINIS code for THE headgasket to use with zetec turbos. Microcat gives so many 2.0 Zetec headgasket variant and the local Ford guy was lost too. He had one on shelf that he though should be the one for Focus RS too, but it looked terribly. All black and didn't even have any fire rings around the bores. Is this really the one to use?