Originally Posted by Kalud
ISO is for Isolated boost control, now controlling directly and no longer adding over stock boost. Nothing magical or voodoo about it, you should use it its a great enhancement.
For the record, the Procede use this since day 1 and its one of the reason I prefer my Procede tune over my JB4. I haven't tried the ISO JB4 yet, a bit lazy on switching tunes again. But I will when I'll test the Cobb AP next week I guess...
I am assuming this is great because you can have the benefits of piggyback tuning as well? Such as running map 5.