Why would CAi from 997.2 not work in 997.1. It comes out from the same area, it has the same tube diameter and one MAF, so why would it not work?

 

are you talking aftermarket or OEM?
the OEM won't fit and the deck fan will hit the top of the case. also the tb is facing the opposite direction. Also the air ducts don't align
with aftermarket pieces, I have no idea since they can make one from scratch... there are several posts (some I created) about this same issue...

 

Ok, I understand that OEM will not fit and I should have specified this when I wrote my post. However, what about aftermarket? Looking at fabspeed CAi, it seems that fitment wise shouldn't be an issue. Fan can be adjusted (I think) and there will no air filter box to line up air ducts.