1.6L EcoBoost head stud kit with fine pitch nuts, for use with a standard head gasket. This head stud kit allows us to get a more even clamp load across the gasket face to cope with the increase boost levels of a tuned engine. They also further increase the strength of the block particularly when used with our uprated EcoBoost block ENG-BLK-ECO1.6-HD-01K but further locking the head and block together.