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I suspect the OP might have a minor point. It could be(and most likely is) that Ryland is correct and they are closer on all Honda's but I was talking to a couple of mechanics this weekend and they all agreed I would need to move the cat forward during lean burn mode.
The reason was the exhaust temp would not be as high.
On that note however they also pointed out(which I had assumed) that if you are in lean burn mode your standard cat is not really going to achieve anything because 3-way cats aren't designed to clean NOx and SOx(in O2 rich environs) but hydrocarbons and lean burn is not going to emit very many hydrocarbons(its the point).
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