SMOG checks or emission tests exist due to the U.S. Environmental Protection Agency's (EPA) regulation on passenger vehicles. Each state sets limits of nitrogen oxides (NOx) from emitting past certain ...
Hemmings on MSN
Jay Leno’s law: The 35-year rolling smog exemption is back (and it might actually pass)
If you’ve ever tried to keep an 80s or 90s classic on the road in California, you know the “Smog Check” dance. It’s expensive ...
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