I have a 93 Jeep GC with a 6 cyc. Has over 203000 miles and fails idle HC…all else is good. Is it true that in CA you have to buy a CAT that has special numbers on it that tells the smog guys that this is the correct part for this car? If you try to buy a cheaper CAT that does not have these numbers it will not pass the smog test? Is this myth or Truth. The difference is about $500 from these CA CATs and cheaper ones.
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