Hi Aaron,
The Novarossi turbo plugs has 2 types of plugs, long- and short body.
According to their numbering system, there is the hot (C, eg C7TC) and cold (F, eg C7TF) type.
The hot (C) model is the long body, while the cold (F) model is the short body plug.
For the hot type (C), which is the long body, I think that it has to do with a greater mass of the plug which will keep the temp longer before cooling of.
That's at least what I understand by observing the data.
Don't know for sure, that's why I was looking for some answer from someone who is more experienced in this field.
My engine came with the F-type plug (C7TF), however, I can only get the C-type plug here (C7TC). What will be the consequences??
