No, it is not CARB legal. Since the tune is "tied" to my vehicle specifically you would need to have it custom tuned, and that is why it technically would not pass CARB testing, or at least that is how I understand it.
Regardless if I'm in the Mustang or STI, I usually get guys in trucks or econo boxes wanting to drive aggressively around me. 20 year old me usually went for it, but I've calmed down as I've aged. I've been fortunate to avoid tickets and accidents. It takes alot of self control to drive higher...
I reached out to ProCharger and they advised the kit would fit with some modification. The tech advised the main bracket bag was different. I would reach out to them directly for more information.