this is what is tested. got it from website:
The actual test assesses three elements on the vehicle:
Smoke puffing from the tailpipe or other areas of the auto.
The effectiveness of the catalytic converter, which is the essential module in controlling pollution.
A computerized gas analysis measured via the exhaust pipe while the vehicle is idling and at high speed.
just to simplify it.
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K&N is CARB and will work for SAI.There is also a company that makes headers that keep the SAI as well.I cant think of there name off hand
heres the wierd thing about the k&n. its legal in my state for 05-06, but not higher. the 57 series,(or some series) is said that it is legal for all states. i looked in their website. as for headers, could it be paceheader, spyder, or dc?