hmm magnaflow are typically a performance company, so i really wouldnt think that the cats would help with smog, if anything they made them to just barely meet the requirements.. id really do your homework for cats. you could even possibly pick up used ones from a wreck or something, but of course you run the risk of ones that are bad or almost... its hard to say, and to be honest i cant really give any true benificial advice . all i can say is maybe call magnaflow and see what they say, once you call them, call a competitor and ask them what they think, etc
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