"I'd be surprised if a set of headers for our X's would be CARB legal. Why would anybody pay an extra 10 or 20k for CARB certification? You would definately fail visual inspection"

They make headers for Fords, Gmc's & Dodges by the truck full... the extra money the manafacturer pays for carb certs to get an exemption number, the same that K&N did on their FIPK, means that anyone can use them, in any state, and not worry about visual, emitions tests, or anything else. Granted that means the people in non emitions places (most of the country) have to pay a little more for headers (to cover the costs of the cert), But the market becomes bigger.. And no one has to worry about moving in a few years, and their truck failing smog tests where ever they move to.. As air quality lowers (smog increases) in major cities, you can expect some form of testing to follow.. Maybe not as strict as CA, but who knows.. Those that are starting inspections are copying CA's guidelines..