i am also interested in knowing how because this is something i plan on getting in the future. im from california and bought my TT viper from florida last year. i had to take it to AAA to get it inspected, good thing they dont know jack about cars, then i had to get it smogged. The car had an AEM so that right there would fail the car. Pretty much anything that isnt stock would fail the visual inspection too unless you pay the guy like i did.
im guessing the pipes can be made black to look factory to pass the visual (but that would be limited to the techs knowledge of lambos), the cats would pass the sniffer but what engine management would be used thats CA compliant?