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I live in CA and every two years you have to smog the car - they physically look at the engine - although ona boxster thye basically just take the top cover off and eyeball it really quickly.. but they do tailipipe sniffer tests.
going catless would not be an option unless you are willing to R&R every two years...kind of a PITA...
what header system would be "economical", retain some type of cat to avoid going off the charts for emissions, and actually make some power you could feel?
anyone in CA put on headers and PASS a real smog test? if so let me know what you're running.
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