For the most part non of them all. It's usually illegal to modify the exhaust to enhance the sound at all and the Fed's have some regulation about replacing, touching, or even looking at a factory installed CAT until it's well into it's life expectancy.I am a big fan of the tanabe concept g blue but it says cat delete so i assume its illegal in nj. Also Does anyone know any good stage 2 legal set ups ? Thanks
so as long as your not required for a CARB its approved been said 49 state approval.. its a bit more expensive but can work with no probs as long as it fits your emmission testing...If your factory catalysts are tired, broken or missing PERRIN™ now offers a replacement catalytic converter that is approved for all states that do not require CARB approval..
You can get a censor that deletes your cel from taking out your cat. And if they use the obd11 port then it should read that your cat is still installed, im pretty sure....correct me if im wrong.All depends on the state. Here in MA they hook up to your OBDII port to test your emissions every 2 years. A lot of states still do the tailpipe test.
But to answer your overall question, it's against federal law to remove any catalytic converter from your exhaust system.