It was the 42# injector pn thread, I believe. I would post a link, but its a pita from the phone, and it wouldn't answer your question anyway.
Regarding the tune update, I think you have two options: 1) order it through whichever avenue you purchased the premium tune in the first place, or 2) contact Vince at trifecta directly.
I have never updated my tune, so im not speaking from experience, just relaying what I've gleaned from the forum over the past year+. Hell, I could be completely off.