I currently have a C&L intake and a 91 Octane tune on my V6. I am installing an NX nitrous kit and converting to dual JBA exhaust (from single stock). Also adding new spark plugs, if that makes any difference, Autolite AR94.

Do I need to get a new tune?

 

At the very least, you should pull some spark timing for the n20...

 

Ok. Does that have to do with the gap or in a tune?

 

Thats done in the tune, but you should close the gap up too