To any of California G35 owners, were you guys able to pass smog with a cat back exhaust? I still have my catalytic converters still on and was wondering if I’m able to pass with exhaust being done. Engine is completely stock.

 

Greetings fellow Commie-fornia G owner
You should be fine, as cat-backs do not modify the emissions systems of the vehicle. As long as you don't have a CEL, you should pass smog.
You can fail if you have an aftermarket intake or aftermarket cats or test pipes. Some of my local shops inspect the intake/exhaust thoroughly, others don't at all & just plug it in and test.

If you get an intake, make sure it has a CARB EO number & sticker. Either stick it somewhere in the engine bay or on the intake, or show it to the smog rep when you have it tested.

 

Yup. Pretty much what Andrew said.

 

Ya you will be fine with the cat back. I just did Nismo headers and Z1 high flow cats. WOW does this car scream now, it breathes like it should and pulls like a banshee until 7K!