To answer your question, The Racingline Y-pipe does not have a CARB exemption mentioned in their website. Althought they claim that it will pass the Smog Test (US).
"... No additional modifications are necessary and the car (in proper running condition)
will still pass all known USA & Canada smog tests."
They also mention: "... Because this pipe deletes a catalytic converter, it is thus branded "
FOR OFF ROAD USE ONLY."
So there is only one way to know. test it
http://www.racinglineperformance.com/sh ... idcategory
It deletes an un-metered cat, so no SES lights come on .