Let me see if I understand by way of an example.
I had a 66 mustang. I had a new engine installed 6 cylinder 200 ci 1 bll.
Since I live in CA I had to have it smogged.
The results were that the car was only at 10% of the allowable numbers.
So it was very clean compared to the standard for the model.
But my 1997 toyota avalon had better real numbers than the 66 mustang.
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