One thing lightblade is forgetting to mention was that this was a new guy doing his inspection. Me thinks he was using lightblade as a practice run or he was jealous of the car. In any event a quick google search turned this up. It says nothing about a DOT number.
http://www.epa.gov/OMS/cert/factshts/catcvrts.pdf
"If the vehicle is out of warranty, the price of a new original equipment
converter (or set of converters) could cost anywhere from $300 to $1,000. Because of this problem
and the sometimes scarce availability of the new original equipment converters, EPA believes that
less expensive yet still effective aftermarket converters give vehicle owners more incentive to replace
their worn-out converters, keeping our air cleaner.
Since the effectiveness of converters depends on their durability, performance, and proper
application, EPA has required aftermarket converters to meet certain minimum performance standards
while also requiring installers to install the appropriate converters. These requirements make
* The 1990 Amendments to the Clean Air Act expanded this prohibition to "any person" and not just individuals in the
service and repair industry.
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everyone 'play by the same rules' while maximizing the air quality benefits obtained. The policy
contains other warranty, reporting and record keeping requirements which make it possible for EPA
to enforce the requirements and ensure that the customers get what they pay for."
Your fine dude. If you are having any other trouble give Rick at Ricks Car Care a call. He's never done inspection for me but has done a lot of exhaust and transmission work and has proven to be a pretty cool guy.