What got my attention is a recent smog I had done on my '90 Vert, all stock including original cat it would have passed by a comfortable margin vs. the Auto's max numbers. But it barely failed with my 30% lower max numbers. I shoe horned in a new cat and got it done anyway, but would have loved avoiding that extra hassle and expense.
New aftermarket cats have such a short life, so would have to again deal with that hassle and expense next time around in two years. But I wouldn't using the stock cat giving the more lenient tolerance apparently given Automatic wanklemobiles. It still makes no sense to me why the difference, but I guess that's the great state of Californicatia for you.
Last edited by hozzmanrx7; 05-06-2013 at 07:45 PM.
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