Bought some BKR6EK to replace the existing BKR5EK as I was told the 5 was too hot + I was experiencing a slight misfire on idle and was told this may cure it. Well changed them over today today and in my (limited) experience with cars these plugs dont look as though they had been running to hot. Cars on standard MAP atm but planning on going stage one at some point in the near future.
Seems to have helped the misfire but not eliminated it completely
Let me know what you think, any input appreciated!