We both live in Cali so these smog laws suck hard... As long as you don't mess with the cats then everything afterward (catback) you can do whatever you want as long as you have any form of muffler and don't exceed 93 decibels. You can also do headers but those need to be CARB compliant or else you will fail the visual. However, if you have "defective" cats then you can get them replaced with some high flow ones that are CARB compliant... Most of the time a company will either say if it is CARB compliant, 50 state legal (also means CARB compliant), or off road use only (not CARB compliant)
Since the mid pipes in these cars come after the cats you don't have to worry.