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1977 Spider 49-State
248 Posts
If you have a full report of the emissions we'd love to see it. US goes on % CO, PPM for HC, and PPM for NOx so some translation may be needed.
Actually depends on the state. Colorado uses grams per mile (GPM) which is what the EPA uses. Just Googled around for MOT samples and it looks like MOT does use % and PPM though.

I don't think there is a conversion since PPM is based on a single point in time whereas GPM is over a measured distance.
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