I just had my emissions done about a month ago with the JoeZ exhaust. All they do is plug into the OBD2 port and look for error codes and since the Sikky Headers come with a clever simulator the car is Error free and will pass emissions.
Son, you're not making it easy for me to save money.
I really don't remember if my STi had the sniffer test. I didn't pay attention because I had a high flowing cat. The place I go to in Hernandez has a guy thats really into cars, so the entirety of the test was us talking about cars.
Oh, btw, my PM and I went lunch and I let him "merge" onto the toll road. After a couple chirps of 1st and 2nd I think I have another F buyer ;-)