California is so full of tree huggers, I am suprised any of their trees still have bark. You must have a "carb approved" intake, exhaust, blah blah blah... Must be the stock/original catalytic converter, as versus a racing cat (or at least according to regulations). You must cultivate a relationship with a shop to get past carb if you have any non-carb approved mods. In short, other neighboring states have a much simpler mechanism for registering "odd" cars.
Storm titanium 2005 Elise with carbon fiber spoiler, BWR sway bar, BOE toe links, gPan2, LidBone, sector 111 wheel studs, Grey RAC Monolite wheels with toyo R1R, Team Dynamics 1.4 with Hoosier A6/R6s, Katana2 Supercharger, ECU with 265 flash. PPE headers w/decat, CEL angle eliminator, Silent touch catback, Rear Panel Eliminator, HKS intake, V2 fuel tank, Walbro255 fuel pump. HID lights.