replying to this old post because I had an interesting (positive) experience here today -
took my new-to-me '96 nsx in for smog today. It is bone stock aside from comptech headers, which is CARB legal. Mohamed was working there , took the EO #, pulled up the document, and after asking me "This is the 3.0L right?", sat there scratching his head because this is what he saw:
http://imgur.com/d3Agvu9 (I have a 1996, 3.0L NSX).
He didn't know what to do and told me he was technically supposed to fail me as the EO# is "invalid" for the 3.0L as it specifies it is only for the 3.2L motors. But he was enough of a car guy to know the 3.2Ls didn't exist in '96, and let me pass. He also mentioned they sent out updated EO docs recently, and ever since, he's been seeing more and more of this kind of issue.
Not sure if I should rely on the good will of knowledgeable smog guys, or call CT engineering for some sort of updated tag to weld to the headers...
Great place though, would recommend them. $61 for the first test, and $10 for the second - I actually failed the first one because the battery was replaced the previous owner just before I bought it and it hadn't been driven enough, so the OBD monitors hadn't set/reported back yet. I drove down to santa cruz to say hello to Jim Russell, drove back up, and passed smog with flying colors
Mohamed also mentioned that he did a GPW NSX recently and a video of it popped up on the nsx forum (prime, i assume) - but he wasn't able to view it because he wasn't a member. If anyone knows the video and can point me to it, I would appreciate it - I promised Mohamed I'd email him a copy of the video if I came across it.