Quote:
Originally Posted by FRSBRZGT86FAN
http://www.dmv.org/ca-california/smog-check.php
In LA because california has some of the strictest emissions laws in the country it won't pass smog certification. You can only get catted EL headers, and a catted header-back exhaust, as well you will need to get a tune so the CEL will dissapear and no codes will be shown in the ECU during inspection before the smog certification test. That being said if your vehicle is six or less model years old, you are not required to obtain smog certification as long as you pay the annual $20 smog abatement fee, so you will be good going cat less for 6 years if you pay $20 every year, but honestly you would still need a tune to make sure the UEL or EL headers you get don't kick up a CEL otherwise every inspection will fail in that 6 year period, also some officers can smell the fact your car is cat less and will right you a nasty ticket, its not worth it, stay catted if you can with an aftermarket exhaust you will still get gains.
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Why EL headers and not UEL? Is there an EGT temp difference between the two that affects the cat?
And if both cats are swapped for high flow, will the sniffer be satisfied? I only swapped one cat for a Cobb high flow on my WRX and failed miserably. Pissed me off.