Smog test in CA requires visual and pipe test, as of my last check the Stillen G3 and any form of cat replacement will fail the visual (turkeys, if it passes pipe tests they shouldn't freaking care). The G3 does have 'CARB pending' on it which means Stillen, God bless them, are paying the ridiculous amounts of $ to get it approved. Aftermarket cats/test pipes definitely will NOT pass the CA smog nazi's
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